Best friends sister [MF]

After a long year, finally having holidays is exciting. I head over to my best friends house. It’s a little earlier in the morning than he might like, especially during the holidays, but the weather’s too good to not go to for a swim. I get to his house, and ring the door bell. I know he told me his parents are away, so hopefully he’s up, and actually answers.

Even just before 9am, it’s already starting to get hot, and I’m very keen to get in the water. Several seconds pass, and there’s no response, so I ring the door bell again. I see a shadow approach the door; it’s shorter than I was expecting. As the door swings open, I see her. His little sister.

She looks like she’s just got out of bed. She’s wearing a white spaghetti top, with a small red pattern, and a short navy blue skirt, barely covering her skinny legs. He hasn’t really talked much about her. The first time he told me about her, she had just come back to home after turning 18. He didn’t seem to want to talk about it, so I didn’t ask.

“Hey, can I help you?” she asks in a sweet tone.

I pause slightly, taking her in. I have to admit she’s absolutely gorgeous. Her medium length blonde hair falls naturally onto her chest, in direct contrast with her porcelain complexion, and her dark eyebrows. Her lips are full, and she’s got a couple piercings. She’s not wearing any make up, other than some mascara, which really accents her deep green eyes.

“I’m here to see Mark” I say flippantly. “You must be his sister.”

“Anna” she says, as she smiles a little bit. “He did say someone might be popping by.”

A few seconds pass by in silence, as we just look at each other. I must be almost a foot taller than her. I have a wide frame, and have been hitting the gym for the last 6 months. As I look down to meet her eyes, I can see she’s taking me in, but I try and play it off.

“So…you going to let me in” I say trying to get her to stop ogling me.

“Of course” she replies back flatly. “Mark is still asleep. He had a big night last night.”

“Sounds like him” I say knowingly. “We’ll have to wake him up then.”

She opens the door, just enough for me to get through. As I enter, she accidentally brushes in to me.

“Oh sorry” she says. “I’m still waking up.”

“It’s not a big deal” I say, not really thinking much of it.

As she closes the door, she says “we’ll just have to go upstairs to his bedroom.”

“I know. I have been here before” I say slightly too condescendingly.

“Jeez, I am just waking up” she retorts.

“Oh, I couldn’t tell” I reply, doubling down.

She rolls her eyes at me, and then smirks “his room’s this way.”

When she walks away from me, I find it extremely hard to not get lost in her hips, ass and legs. As she starts climbing the first stairs, her tiny little skirt bounces against her ass. She’s not wearing any underwear. Her ass is just as pale as her face. God I bet she can feel my eyes on her. She’s my best friend’s sister I’ve got to look away.

I start climbing the stairs too. Their house is the largest on the street, high ceilings, and the staircase ascends quite sharply. I look up again, and her bare ass is on display. I slow down my pace, trying to control where I’m looking but it’s no use. I’m several steps behind her now, and I’m sure she can feel the heat of my eyes taking in her tight little ass. As she gets ahead, I can see the outline of her tight little pussy. Her little pink folds, picturesque between her pale cheeks. I bite my lip, and close my eyes briefly, as the image of her spread for me races through my mind. I bet she tastes amazing, her little pussy ripe before her morning shower, all mine to enjoy her sweet nectar. My body’s responding to her, much faster than I thought it might. I feel a little guilty, she’s my best friends sister. I can’t think like this right now.

As we get to the top of the stairs, she waits and looks back at me. She gives me a satisfied look.

“You know the way from here, don’t you” she smirks at me.

I pause for a second. She probably just looked at me like that because I was smug before. There’s no way she knows just how much of her I’ve seen. That would mean she wanted me to see it.

She doesn’t even wait for a response. “I’ll catch you later” she says, as she puts her hand on my arm, and smirks to herself and then walks off.

Her room’s just before Mark’s. She walks ahead of me. I can properly feel the bulge in my pants now, and I’m not sure I want to walk incase she looks back again. I try and adjust myself, but my cock just hardens further. It’s been far too long since I’ve had a release, and my cock is throbbing now because of her. I watch her as she walks off, entering her room which is just next to Mark’s.

I wait for a few minutes, trying my best to get my cock to stop misbehaving, and just lose this boner. The image of her is etched into my mind, and I’m really not able to stop my desire from showing. Waking up Mark with an erection would raise way too many weird questions. I wait and just enjoy the view from the second floor. Seeing the beautiful jacaranda trees that soften the skyline towards the city, but I can’t think about anything else than his sister’s gorgeous little pussy.

I know it’s futile, so I just decide to knock on his bedroom door and hopefully things should chill out by then. Approaching his room, I see his sister has left her door open, but I do my best not to look in. I knock loudly. Mark’s a deep sleeper, and it’s going to require an effort to wake him up.

The first few times I bang on his door, don’t really do much. But after yelling his name a couple times he finally wakes from his slumber.

“Shut up” he says. “I’m trying to sleep.”

“I told you I’d be here, you lazy fuck” I respond. One of the perks of being best friends is that basically anything goes.

“Shut it dickhead” he retorts. “You can go and have a swim and I’ll join you at a reasonable hour.

Although I’m a bit disgruntled he doesn’t want to keep his word, it’s not worth the risk of opening his door. He could be in any state. I walk back towards the stairs, again trying my best not to look into his sister’s room. She can’t know what’s been running through my mind.

As I get down the stairs, and wander outside, I realise just what a great day it is. The weather is perfect for soaking in the sun, and chilling around the pool. If only Mark wasn’t so lazy.

The warmth of the sun on my skin feels amazing. Their pool is just the right temperature, and I can see myself swimming all morning. I grab the sunscreen, and take off my shirt. Looking at myself in the mirror, I realise I’m in the best shape of my life. I start spreading the sun lotion all over my arms, pecs, abs and back. Trying my best not to miss any of my upper body. I apply it to my face and neck as well, and then enter the shallow side of the pool.

The chlorinated water comes up to my waist. It’s so refreshing. As I revel in using my best friend’s pool, I look up. There’s his sister. In a tight bikini, walking toward the pool.

Her bikini is light pink, barely covering her. As I stand in the pool, my eye line is at the same height as her hips. Without even thinking I’m staring at her, seeing the tight fabric against her, her little folds creating a gorgeous outline. Somehow seeing her more covered up, makes me go crazy. I can’t believe how much I want my best friend’s little sister.

I scan up, and see just how tight her body is. Her flat stomach, completely juxtaposed with her ample tits. I almost wouldn’t have believe they were real. They’re so perky, and perfectly shaped. Hard to believe that this is real, even if she is just 18.

She approaches and notices the sunscreen all over my torso. “Hey do you mind doing mine as well?” she asks in a cutesy tone.

I’m already wet, and in the pool. But she does need help not getting burnt.

I get up, and barely dry myself off, letting the water drip down my body.

“Where do you need help with?” I ask.

“Mainly my back” she says, whilst smiling again. “I really appreciate your help”

Getting behind her, her hair looks so soft, and she smells absolutely amazing. As she brushes her hair to the side, exposing her back, some of it softly runs against my skin. I grab the sun lotion, and almost fill one of my hands, having to squirt the bottle several times, as it’s almost empty.

I rub my hands together, and then onto her back. Her skin is so soft underneath my hands, and I can feel her breathing, her chest naturally expanding in and out. A few of the tiny blonde hairs on her back glint in the sunshine, as I make sure I massage the sunscreen into her back. I’m feeling so much tension inside of myself, and I know it might be coming through my hands but I can’t help it.

She undoes her bikini top, as I make my way lower. I make sure I don’t miss any of her, as my hands explore her back, covering her with a good layer of sunscreen.

“I always miss the sides of my body” she says. “Do you mind helping me?”

I just nod as I grab some more sunscreen. She lifts her arms forward, and her bikini top almost comes off. She reflexively covers her chest with her hands, whilst still keeping her arms raised. She just grabbed her bikini top in time, keeping herself covered.

Moving slowly up and down the side of her torso, my hands can’t resist pressing a little harder against her. As I get higher, I don’t want to miss a spot. As my hands run over her, it seems like she’s closing her eyes and smiling to herself. Is she enjoying this? Surely not. I’m just putting sunscreen on her. Not wanting her to get burnt, I rub it all over her, even covering a bit of her side boob. She exhales a little harder as I touch her there. I don’t want to take my hands off her. I can’t help but think maybe she’s enjoying this too. She’s so soft and the very small part of side boob felt even nicer than I could have imagined.

“Thank you” she says, as I finish up. “I’m just going to lay down and let this soak in.”

She lays face down, still not tying her bikini top up, as she puts her headphones in and listens to music. I see her boobs get accentuated under as she lays down whilst she closes her eyes and takes in the sun. Her legs are together, and her light pink bikini bottom is riding right up her ass. The outline of her little pussy lips are so clear, and as I look there’s a small, wet patch in her underwear. This makes my mind drift further, as I feel my cock throb yet again.

I start to wonder if she knows the effect she has on me. And if she’s feeling anything too. Surely she isn’t feeling the same way I am. It would be so wrong.

I jump into the cool water, allowing it to wash over me. All this tension is bubbling up inside of me, and I know I need to release it very soon. I just enjoy the pool, doing a few laps to release some energy.

After a bit of time, I notice she turns onto her back. She didn’t really apply much sunscreen to her front, but she seems content just as she is. She relaxes a bit more, and lets her arms drift by her side. As she moves a little bit, her bikini starts slipping, ever so slightly. She’s still fully covered, but the bikini top is riding down her boobs, showing off her perky round breasts. The fabric is moving against her, and I can see her nipples getting hard.

As I snap back to reality, I realise I’ve been looking at her for a while now. Hopefully she hasn’t noticed. Just as I try and regain my composure, I hear something.

“Hey!” It’s Mark. “What are you doing in there?” he yells and then pauses.

Oh fuck. He’s just seen me checking out his almost naked sister. What’s he going to think.

“Get ready to get wet” he yells, as he runs up and jumps into the pool, the water crashing and forming several waves, just missing me with his neigh on belly flop.

Without thinking I splash him vigorously, getting him back for covering me with water. Not amused, his sister leaves shortly, and I do my best not to look at her as she heads back inside. Mark can’t know the effect she has on me.

I hang with Mark in the pool for a long time. It’s fun just shooting the shit, and catching up. Hearing about his Christmas, and solidifying our plans for NYE. It’s great to be able to spend time with my best friend, and I feel very fortunate, as we have a ridiculous NYE planned.

After staying in the pool for ages, and hearing about the extravagant presents Mark got this year, I’m starving. Mark says he’ll go out and grab some food for us, and he’ll be back shortly. I thank him for being a good friend, and head up to the upstairs bathroom to rinse off.

Once I’m upstairs, I head into the bathroom, closing the door behind me. I piss in the toilet, and then go to wash my hands in the sink. Inconveniently, his sister has left her light pink bikini bottoms hanging on the sink. I don’t want to get them wet, in case she comes back in to grab them shortly. So I pick them up to move them, to make sure nothing awry happens. As I pick them up, my cock hardens and starts throbbing, having a mind of it’s own. They’re completely dry, except for one little spot. She didn’t go swimming, so my mind starts racing with eager curiosity. Even though I’ve been looking at her this morning, this feels like another step entirely. I can feel my cock throb against my bathers as I think to myself. She’s the one that left them there. I wont know what’s really on them, unless I find out. Even as I try think about it, my body just decides for itself.

My hand raises her panties to my face. Her underwear smells so sweet. Her juices all over this little spot of her bikini. My cock moves against my bathers, as I let it free, and reflexively start stroking myself. All of the images of her from today start rushing through my head. I know I’m not meant to do this, but as I start slowly stroking myself, I also know I can’t stop. The thoughts that race through my head are too vivid, my entire body wants her all to myself.

Just as I start to pick up the pace, there’s a strong knock on the door.

“Hey, I left something in there. I just need to grab it.” It’s Mark’s sister. Fuck.

There’s no lock on the bathroom door, and I can see the handle move before I get a chance to say anything. I quickly drop her panties back onto the sink, and take my hand off my throbbing cock, sheepishly looking at her as I feel extremely guilty about all the thoughts I was having. How am I going to play this off?

As she walks in she’s still wearing her bikini top, but with tight grey cotton booty shorts, which hug her hips tightly. They’re really tight against her, and I realise she’s not wearing any underwear as again I can properly see the outline of her little folds. This time so up close, that I have to admit that she would definitely have a pretty little pussy.

“I’m in here” I say, doing my best to look her in the eyes. Even though I try not too, I can feel my cock go to full mast, as having her in front of me makes me almost lose control.

“What the fuck” she says and then pauses. “What the fuck are you doing.”

This is my best friend’s sister. How can I tell her, what I’m thinking? What I’ve been thinking all morning.

“I was just about to hop in the shower” I say. I think about pulling my pants back up, but she’s already seen me, I don’t think that would change much.

“Sure you were. Having some alone time, huh?” She says in an annoyed tone. “I have to use this bathroom too.”

“You could have knocked” I said, even though I didn’t sound too convincing.

She looks at her bikini bottoms on the sink, and gestures toward them. As she does, I can feel my cheeks go red. Oh fuck.

“Were you playing with my panties, you fucking perv?” she demands angrily.

Maybe she didn’t mean to leave them there. I must have been misreading her all day.

“No” I say as authoritatively as I can. “I just have a boner, it’s not a big deal.”

“Not a big deal?” she says raising her voice. I wonder if Mark’s home yet, and really hope he isn’t. “Not a big deal? I’m your best friends little sister. Why are you showing me your hard cock?”

I realise I’ve got to get out of this, asap. “I’m not. You barged in here, whilst I was using the bathroom. That’s on you” I say my tone getting more stern.

“Bullshit. You were sniffing my panties and playing with yourself” she says as she points to my throbbing cock. “You’re a filthy perv.”

“You entered full well knowing I could be in here. This is your fault.” I say back unflinching.

“Whatever. You’re gross” she says as she grabs her bikini bottoms and heads out in a huff.

Fuck. Fuck. Fuck. What am I going to say to Mark. What is she going to say to him? I have to tell him first, and clear the air.

I jump in the shower, I want to relax by letting the warm water cover me. My cock is absolutely throbbing, and even in this embarrassment, all I can think about is my best friends sister. As I soap myself up, I decide not to let myself get lost in all these thoughts. I need to be a good friend to Mark.

After rinsing off, I get changed into my spare clothes, and leave my bag in Mark’s room. Just as I walk downstairs Mark comes back. What’s worse is his sister’s in the kitchen. She’s changed, and is wearing a loose fitting top, and some less revealing jean shorts. There still pretty short, but it’s weird that’s she changed again.

Mark’s brought lunch from that gourmet place he likes. She’s got something vegetarian, and Mark and myself have separate meals, and they look delicious. As I realise we’re all going to sit down to have lunch, I’m dreading what could be said. Me and Mark sit down across from each other, as his sister stays in the kitchen.

“Hope you guys weren’t too bored without me” Mark says slightly cheekily.

“Didn’t even realise you were out” his sister replies nonchalantly.

He looks at me. “Did you stay in the pool much longer?”

“Yeah a little, but then just went to have a quick shower” I say factually. I notice his sister smirk to herself, and then sit in-between us. What is she playing at? Is she going to say anything.

Lunch continues as normal, and I try to act as comfortable as possible. A few minutes into it, Mark asks me “did you catch the game yesterday?”

Just as he asks me that, I feel a leg against mine. It’s very smooth and soft. Instantly I realise it’s his sister, brushing up against me. She moves shortly after, so I try not to think about it.

We keep eating and just talking about yesterday’s game. Although, I can’t really think much about it. As we all finish up, Mark takes our plates to wash them up. He heads to the kitchen sink, and runs the hot water. He seems pretty happy, just looking down at the dishes, thinking to himself as he washes up.

I hear a whisper, as I realise Mark’s barely out of earshot. “So, you’re not going to tell him what happened?” Her facial expression seems pretty normal, but I really hope Mark didn’t just hear that.

“What do you mean?” I whisper back, still hoping Mark can’t hear anything. He hasn’t looked our way, so I really hope he can’t hear this.

“You know” she whispers a little louder.

I look at her indignantly. How can she enjoy being like this. She’s a lot more trouble than even I thought she could be.

“Nothing happened” I whisper back.

“Oh really” she says, this time deliberately talking in a loud voice.

Mark looks over. “What was that?” he asks.

“I was just telling her about how football works” I say. It’s a lame excuse, but hopefully Mark thinks we’re just talking about the game.

“Good luck” he responds. “She couldn’t be less interested in that.”

“I’m really not” she says as she gets up. “Thanks for lunch Mark, I’m just going to head upstairs.”

I’m relieved that nothing happened, but as I go back into my body, I realise I’m slightly hard too. Part of me, a large part of me it seems, finds it really hot that she’s my best friends sister. That I’m not allowed to do anything. She keeps giving me mixed signals too, which for some reason is driving me crazy.

As Mark finishes up, we head into the downstairs lounge to play Fifa 21 on his new PS5. I get a lot out of being Mark’s friend. His best friend.

We play a few games, and as usual Mark starts getting vocal. I take it a little easy, as I warm into it, but as the first game progresses, it’s very clear I’m in control. He knows this, but still wants to play every time. Relishing his rare wins.

By the end of the second game, he’s full on yelling at the TV. He seems to think it’s the referees fault he’s losing. Or maybe the rigged VAR system. Either way, in the kerfuffle, I realise I’ve left my phone upstairs in my bag. He’s adamant that he wants another game. He’s going to win this time, or so he says. He starts choosing his team for the next match, as I head upstairs to go grab my phone.

Before I walk into his room to grab my phone, I can hear something behind Mark’s sister’s door. As I get closer I realise what it is. She’s moaning, quite softly, but it’s just audible outside her room. I can hear her moans becoming more intense and breathing getting deeper. I know I’m not meant to hear this, she probably thought she had some time, once she heard all the yelling in the last couple games.

I exhale, trying to release the tension, but I can’t help but think about what she could be doing. About what she would look like right now. After allowing my mind to wander for a split second, I head in to Mark’s room to grab my phone. Without thinking, I accidentally close the door way harder than I was intending. I quickly find my bag, and grab my phone from the bag’s hidden pocket.

I scroll through some messages briefly, and then open the door to head downstairs. As I do, I realise Mark’s sister’s door is open. I wasn’t expecting that, so I look over without thinking. Fuck. There she is. Sitting on the floor, perched against her bed, with her feet close to her ass. She’s still wearing the oversized shirt, and it’s covering most of her, but her hand is still playing with her little pussy lips, as she looks up at me daring me with her eyes.

Fuck. I wasn’t wrong. She has been teasing me all day.

I’m frozen. Feet completely stuck to the floor, as she keeps touching herself, and moaning softly. I know this wont be carrying downstairs, especially as the TV’s so loud with Mark setting up the next game.

She looks at me and then smirks to herself. Her right hand is lost in a rhythm, circling her clit and playing with her little pussy. I can see glimpses of her bare skin, as her shirt naturally moves up and down in time with her hand. Her eyes roll back in her head, as she looks up at me again. She’s so sultry, and she opens her mouth just slightly, her tongue moving slowly around her full lips, before she softly bites the corner of her lips.

Her hips are gyrating subtly under her own touch, as she brings her other hand up to her mouth, and starts sucking on her index finger slowly. She takes just the tip of her finger at first, progressively taking more and more as she starts to lift in intensity. Her whole body is moving in time with her hand, as I can see she’s starting to approach what she so obviously needs.

I just swallow as strongly as I can, resisting every urge in my body, to make a move. I can’t do this, even as she sits across from me now, a picturesque image of a sultry, gorgeous young woman. To experience her, in this brief window of time wouldn’t do her justice, even if my cock thinks otherwise. My underwear’s practically covered in precum, as I touch myself over my clothes.

Her eyes widen as she see’s me join in, as she picks up the pace. She’s quickly rolling towards getting her release, as she becomes flushed. She takes her spit covered hand out of her mouth, and starts playing with her tits over her shirt. Her nipples, are already hard, and as the spit covers her shirt, I can see the delicate pink of her hard nipples poke through her shirt, as I can make out just a part of her pretty little areolas.

My cock is absolutely bulging out of my pants now, and I know that I wont be able to hold on for much longer. She closes her eyes for just a second, as I see her hips buck, and push into her hand, as her whole body trembles, and she climaxes completely, letting out a loud moan. I almost bust in my pants at the sight of her reaching such an intense orgasm. She puts her hand into herself, covering a finger in her sweet juices, as she looks up at me and sucks it clean ever so slowly.

I drift back to thinking about seeing her wet little panties in the bathroom earlier. Was this her plan all along? At this stage, my cock just wants to take her, but I can’t. Mark can’t know anything about this. He hasn’t called out yet, but I know he’ll get suspicious if I stay up here too long. I look at her and smirk a little and then exhale deeply. I walk away wordlessly and go to the bathroom to splash cold water over my face.

As I head downstairs, Mark see’s my face is a little damp, but is otherwise none the wiser. “Couldn’t handle the heat?” he says trying to rip me. “Guess you’re not up for another game.”

“Nah, I’ve got you. Just thought I’d give you some time to prepare” I say joking back.

The next game, I can’t help but just let loose. I usually hold back just a little against him, but I can’t contain myself. By the end of the first half, it’s 4-0 and Mark is furious.

“Fuck you” he says as I score again early in the second half. I realise that I’m not holding back, and don’t want to make him feel bad, so I ease up a little, but even then I will probably still score another couple times. It’s getting pretty tense, and we’re not really speaking.

As the game is almost drawing to a close, his sister comes and sits on the couch opposite us. She’s changed again, this time into a tight white crop top and shorts that frankly no guy could get away with. I’m not sure if Mark has noticed her several outfit changes, or if she just does this most days.

Just before the game finishes, she makes her first comment. “He taking you for a ride, hey Mark?” she says deliberately insulting her brother.

“Nah, the game’s just fucked. Fuck this” he says, unable to hide his rage.

It’s clear he wants to mix it up a bit. “Drinks?” he says. His monosyllabic utterances, commonplace after a significant loss.

“Sure” I say, as he gets up to grab some beers.

“Want one Anna?” he asks, obviously thinking she’ll say no.

“It’s a bit earlier than I’d usually start drinking, but sure” she says cutely.

She looks at me cutely. It’s a different vibe than before. She seems happy to be around me.

As we settle into the first drink, I decide to test the waters a little bit. “You look pretty relaxed now Anna.”

She looks at me, not really changing her vibe. “Yeah, it’s been a funnn day” she says, emphasising the word fun.

Oooop. I realise she’s ok playing with fire, and don’t want to push it further.

“So, how was last night?” I ask Mark. From what his sister said, he had a big night, and he usually has some interesting stories.

“Oh, you know. Just the usual” he replies casually. “Had a date with this girl, but I don’t know. She’s not really my type.”

“You left early then?” I said cheekily, knowing he stayed out late.

“I was going to” he said, before a decent pause. I don’t know if he wants to go into detail in front of his sister. But after a couple seconds he said “but I was already out and decided not to waste the night.”

I didn’t really have to ask anymore. His history with women told me all I needed to know. But then his sister jumped in, obviously trying to make him a little embarrassed. “Yeah. You didn’t get much sleep, did you Mark.”

“Shut it you” he said, clearly annoyed to be talked to like that by his little sister.

She just smiled. “You brought her here. She’s fair game” she said back confidently.

He looks down, not really sure what to say. “Ok, I had a girl over last night” he admits, as if somehow I didn’t catch on before.

“Making the most of having your parents gone, hey” I said slightly amused.

“Haha, yeah” he says obviously wanting to stop the conversation. His sister sees this and then laughs to herself a little bit.

I look at her, getting her to look up at me. “What?” I say as I turn and look at both of them a few times.

She looks like she’s about to say something but doesn’t. There’s a bit of tension in the air, and I’m not sure what’s about to be said.

“Well” Mark says, as if he’s about to reveal a big secret. “She wasn’t exactly the only one recently.”

I break out in laughter. I know this. This is Mark. Of course she wasn’t the only one.

“I’ve been branching out a bit recently. Which is unusual for me” he says, as I realise he hasn’t exactly been completely honest with his sister.

“Oh, ok” I reply, trying to catch on. “Well I guess it’s fine to do that for a little bit.” I think she buys it, but she also seems a little sceptical.

“C’mon Mark. Even I’ve heard the stories” his sister says, looking him dead in the eye. Seeing his little sister realise his wild past, and his reputation wasn’t easy for Mark. He gulped down two big sips and finished off his first beer.

“Who wants another one” he said.

I follow suit, but his sister just sticks to her first drink. As Mark sits down, he looks at his sister. “So, what have you heard.” Candour is definitely one of his strong suits.

“Well, I don’t want to go into details. But I know you’ve had quite a wild past” she said.

“Doesn’t everyone? That’s just growing up” he says nonchalantly.

“Mark. Literally everyone I know has a story about you” she says. I know she’s right, but I can tell Mark feels uncomfortable with his sister knowing this stuff about him.

I decide to jump in here, and back him up. “Doesn’t everyone like a bit of fun?”

“Not her” Mark says, gesturing to his sister. “She just keeps to herself, and is always well behaved.”

I have to do my best to not spit out my drink. Surely these two can be more honest with each other. She doesn’t seem anything like what he’s describing. They may be siblings, but they don’t seem to have a close relationship at all.

“Yeah, I’m good, but I have to hear all these women you bring home” she says.

“That’s enough” he says authoritatively. “It’s not my fault you’re boring. Loosen up once in a while, you might even like it.”

“I’m happy as I am, thank you very much” she says. “Plus, you know, boys my age are just that. Boys. They might be adults, but I can’t stand them.”

“So, what? You just want some old dude?” he says, clearly ribbing her.

“Nah, just someone who’s a man. Someone who I can have a proper conversation with, who knows what he’s doing and will take care of me.”

“That’s fair” he says. “You friends are really annoying. Almost as annoying as you.”

“Fuck you” she says, pulling the finger at him.

“What do you think about that?” he says to me.

“Sounds like she really put you in your place” I chuckle to myself.

“No, about what she said before” he said, being more earnest.

“Ahh, well I don’t really want to weigh in” I say, trying to by time to think of a good response. “But, if I had to then I guess, whatever makes her happy. That’s what you’d want for her, right?” I say looking at him.

“Yeah of course” he said matter of factly.

“And based on your track record” I say, watching his face tense a little bit “it might be good that she is waiting. She might find someone that can take her as she is” I say without really thinking.

He looks at me quizzically.

“Like give her what she needs. What she said she’s looking for. Don’t think many guys would suit, based on what she said.”

“Yeah” he says as he pauses and takes a drink. “She does have high standards, but wouldn’t you if you were her.”

As he says that, she blushes. “Awww” she says, as she gets up to give him a hug. She brushes past me, and bends over to give embrace him. As she does, I can’t help but take in how great she looks in those shorts which ride up her hips so perfectly. Her ass is perfectly round, and as she bends forward, I catch her shorts riding up it getting tighter against her. With a couple drinks in me, I feel my cock harden, and adjust slightly in my seat, trying to cover it with my shirt and hands.

“I always knew you loved me” she said to her brother.

“Shut up” he said. “You know I’ve always thought you were too good for almost any guy.”

I start getting more turned on, as I realise maybe they are closer than they’re letting on. The atmosphere’s definitely changing, but I don’t really want to assume anything.

Even as she gets up, I notice his eyes don’t follow her, instead he looks down. I don’t know what’s going through his mind, but she sure does look happy. For a moment I thought she was about to sit down in between us. She bends down slightly, but she seems to decide against it, touching my leg to keep her balance, as she walks back to the couch opposite us.

“So” she says looking at me, “we’ve heard about Mark’s holidays. You got up to anything fun?”

“Well just the usual” I say, trying to dodge the question.

Mark looks at her and shakes his head. She furrows her brow slightly, curious and a bit annoyed she can’t know what’s behind that.

“It’s not a big deal” I say. “I broke up with my girlfriend recently.”

“Oh, I’m sorry to hear that.” Her body language, really doesn’t match her words, as she looks slightly relieved, and almost happy.

“It’s not that big of a deal. It’s been good actually.” I said, trying to sound positive.

“You made the right choice leaving her” Mark said. “You can do way better.”

“Thanks dude” I say, as the room quietens for several seconds. “She was great, and really interesting, but wasn’t really good in the long run.”

“Interesting’s the right word” Mark says.

“What do you mean” his sister jumps in, obviously very curious.

“I don’t want to get in to this” I say.

“C’mon I want to know” she says.

“I don’t have a problem telling you, it’s just I don’t want to be judged for it” I say back.

“I wont judge you, I promise” she says, looking hopeful I’ll tell her what’s on my mind. Mark seems a bit apprehensive, but nods slightly. I realise some of this stuff must have come up in the stories she’s heard about him, or at least it will in the future.

“Well, I guess we just lived an alternative lifestyle” I say.

She looks at me even curiouser.

“We’d go to parties, and meet people, and enjoy all we could” I said. Mark looked down, just a little bit, and I realised he didn’t want me to mention anything about him.

“Oh, ok. That stuff is pretty normal now” she said, not really seeming surprised.

“Yeah I get that. You get snippets in movies and books, but it’s not the same as the real thing. My girlfriend, ex, was already deep into it when I met her, and she slowly winded it down, wanting to focus on me as she realised she got more from me than everyone else combined.” I paused and took a sip of beer. “Over time we got into the lifestyle, and for a while it was all I wanted. But, eventually, she was no longer enough for me.”

“No longer enough?” she asked inquisitively.

“Well, I gave her all she needed, but I started feeling like I needed something more from her. We made things more intense, and I hoped that would be enough, but it wasn’t. Don’t get me wrong, she was great, did whatever I asked, no matter how far we got into it, but she just wasn’t the one for me.”

“Well, I’m hesitant to ask this” she said trailing off.

“Go for it” I replied.

“Is one person enough for you? Would you maybe need more than one person to feel fully satisfied” she asked genuinely.

I looked at her, a little shocked that she would have that insight. “Well, yeah. That’s what I’m figuring out now” I said. “I usually jump into relationships quite quickly, but this time I want to take my time. I feel like the right people will come into my life. I just have give it time.”

She smiled looking at me. “Good, it sounds like you’ve got it all figured out. Does anyone want another drink?” We both nod our heads, as she heads into the kitchen.

As she’s gone I turn to Mark. “So how was last night? Sounds like you had a great time.”

“Yeah, you know it was good to let loose a little” he said. “But honestly it was a little weird.”

I raise my eyebrows a little to ask him what’s up.

“Well, she was great. But, I uh… you can’t say anything if I tell you this” he said nervously.

“Ok” I reply quite flatly.

“Well, the condom broke, and I had to grab a spare from the bathroom, and well when I got into the hall, my sister was there. She looked a little surprised that I saw her, but honestly, I was a bit unsure of what to make of it.”

“Oh, yeah that is different” I say, as my thoughts start to race back to earlier today. Whilst her brother thinks she innocent, from what I gathered about her today, she could definitely have been there on purpose. Even that I found kind of hot, if I’m being honest, but I could also see how it would weird him out a bit. “I wouldn’t really think much of it” I said as reassuringly as I could.

“Yeah, I guess. It just must be hard for her, if I’m meeting all these people and she’s not putting herself out there.”

The conversation quickly trails off as she reenters the room with our drinks.

“What are you guys talking about?” she asks, as we become quickly quiet.

“You” I say honestly. I can see Mark tense up.

“What about me” she asks.

“Well, Mark was just saying how great he thinks you are” I say part truthfully.

“Aww thanks big bro” she says to him, putting her hand on his arm as she gives him his drink. “You guys have left me all alone on that other couch.”

“You’re welcome to join us” Mark says to her comfortingly.

Thinking she’s going to sit between us, I move over slightly. But instead, she goes down to sit on Mark’s lap, the skin of their legs touching, as she lowers herself onto his lap. He puts his hand on her shoulder, and it seems very brotherly. But after a few seconds he seems to want her off. He basically pushes her off himself, as he eagerly stands up and starts walking out of the room.

“I’ve, uh, got to head to the bathroom” he says a little tensely. As he walks away, I catch a glimpse of something forming in his shorts. I don’t think much of it, that’s his sister. She has an effect on me, but he wouldn’t feel that. Mark is known for being really into sex, some people going as far to label him a sex addict, but surely he has a line that he doesn’t cross. Even him. He was hesitant to let his sister know about his past. He can be really wild. But this line must not be crossed.

As he leaves, his sister comes closer to me, our legs touching as she positions herself next to me. “Hey” she says to me cutely.

I just smirk and look at her in the eyes.

“Well today’s been fun” she says sweetly.

“Yeah, you’re a real tease” I say to her, not wanting to waste our time alone.

“What do you mean? I’m good” she says playing innocent. “Just ask Mark.”

“Hmmm, you may have him buying your good girl act, but I saw you today.”

“I am good” she said insistently. “It’s not like you were looking away.”

“Well, your bedroom door was open” I say slightly condescendingly.

“Not then. I mean earlier. On the stairs. In the pool. In the bathroom. You like what you see” she said smugly.

“You were the one staring at my cock in the bathroom” I reply flatly.

“Well you were hard, after sniffing my panties” she said her lips slightly pursed.

“Forbidden fruit is the sweetest” I said unwaveringly.

“Oh, so you think I’m sweet” she says in a flirty tone.

“Taste sweet” I said, as Mark just enters the room.

“What tastes sweet?” Mark asks genuinely trying to join the conversation.

“This summer ale” I say holding the beer close to me. “It’s been a great day, cheers to tonight.”

We all come together, and clink our glasses, as I think about the night to come. / Just wrote this. Could potentially write a Part 2 about the rest of the night, let me know what you think

Source: reddit.com/r/eroticliterature/comments/kodelk/best_friends_sister_mf