Sister in law Surprise (str8)(MF)(nonfiction)

I have been married to my wife for over 18 years. We have a GREAT marriage and we love each other more now than when we first got married. But like all marriages, we all have that one fantasy that we know will probably never happen. My wife and I are swingers, but we usually lean more towards the Stag/Vixen aspect of the lifestyle. And even though we are into the lifestyle, there are still some things that we know are kind of off limits. For instance, my wife fantasizes about two of my friends that she could never approach because of who they are and what they do. And me, well, what married man has never thought about doing his sister in law at least once in their life. But again, these are things that we can only fantasize about, so we normally don’t dwell on them.

And then…….a once in a blue moon moment occurs. Which is exactly what happened to me.

We had just moved into a bigger house and my son needed a bed for his room. And it just so happened that my mother in law had just bought a new bed and was willing to sell us her old one for cheap. On my next day off, I had several errands to run and since I was going to be in town I wanted to go ahead and pick up the bed. I called the mother in law and told her I was gonna drop by as soon as I got done with my errands and she agreed that it would be fine. She also said that she had some stuff to do and that if I got there before she got back to just let myself in with the key because April (sister in law) was at work and the kids would either be in school or with her. She said I could just go on in and start taking the bed apart. I told her that was fine and that I’d call her on my way to her house.

I finished all my errands around 12:15 and called to let her know that I was headed to her house. She told me that she wouldn’t be back home until at least 2 pm and that I could just go on in and get the bed and just leave the money on top of the refrigerator. Which was fine by me because I didn’t want to have to stick around and wait on her for an hour and forty five minutes.

Well, I arrived at her house around 12:30, pulled the 4runner up to the door so it would be easier to load up the bed, then I went inside. I took my tools into her bedroom and laid them down on the floor.

I moved the mattress and the box spring off the frame and leaned them up against the wall. Before I started breaking the bed frame down I decided to go take a leak first. I walked down the hall and opened the bathroom door and was stunned by what I saw.

There laying in the bathtub, completely naked was my sister in law. I stood there in awe for a moment before I realized what was happening. She was laying there, with her eyes closed, rubbing her clit with one hand, and fucking herself using a brush handle with the other. A huge boner immediately popped up in my pants as I took her all in. She was about 5’2 with short brown hair. Her perky nipples stood firm up from her glistening 34 C breast. She had a bit of a belly from having four kids, but it didn’t affect my hard on. She had thick thighs that were spread apart enough for her to get both her hands on her trimmed pussy. She was moaning just a little, but it was almost muffled by the sound of the splashing water. It was a beautiful sight to see and then my mind started to race. I began to ask myself what I should do? Should I just close the door and act like I never saw her? Should I just make a sound or do something to get her attention? Or should I just strip down and see what happens?  I was torn. But one thing was certain, my hard on made me have to pee even more. I really wanted to just make a noise in order to get her attention, but I thought better of it, and decided that I could just go outside and pee. So I would just close the door and act like nothing happened. And as I stepped back out of the bathroom and began to shut the door, The floor where I stepped and the door both made loud squeaking sounds and April jumped straight up and looked right at me.

“What the fuck are you doing?” She screamed.

“Holy shit, April, what the fuck are you doing here?” I responded trying to cover my ass and turning my head as if not to look.

“You’re supposed to be at work!  Martha said you were at work. I was just taking the bed apart and had to pee.” I continued.

“Whatever!! Get out!” she screamed.

I closed the door and made a bee line outside to take a leak. My mind was racing a hundred miles an hour. I was torn between going back in and talking about what just happened or just leaving it alone. I mean it was an accident after all. So I decided to just go back inside and finish taking the bed apart, load it, and then get the hell out of there.

I went back in and started unscrewing the frame. I had just gotten the headboard loose when I heard April’s voice behind me.

“Well, that was awkward huh?”

“Yeah, a little bit.” I responded. I never turned around.

“So what are we gonna do about it? She asked.

“Do about what?”

“You know about what!” She retorted.

“I don’t know, April, you tell me….”

“Maybe we should just keep this between us huh?”

“Yeah, that might be the best thing to do.”

“Well, I won’t tell if you dont!” She said.

“However, I have one condition.”

“What’s that?” I asked.

“I need you to help me with something!” she said shyly.

“And what is that?”

“I won’t tell a soul, as long as you help me finish what I started and what you rudely interrupted!”

“And what might that be?” I said as I turned around to face her.

Again, I was shocked to see her standing in the doorway completely nude.

“You know what I need you to do!” She said.

Of course, I knew what she wanted but I wanted to hear her say it.

“And how exactly do you want me to help you?” I questioned.

“I guess you can use your mouth and fingers……”

“And what am I using my mouth and fingers to do April?”

“You’re gonna use them to make me cum… ”

” And if I don’t?”

“Then I’ll tell mom and big sis that you came on to me and tried to force yourself on me!”

“You’d really be that shady? You’d really tell them that all that bullshit?”

“Do you really want to find out?”

“No, not really. But what about your sister?”

“What about her? She never has to know anything. This can be our little secret. All you have to do is come in here, eat and finger my pussy until I cum and we’ll never discuss this ever again. Besides, you know good and well that you want to know what I taste like.”

With that being said, she reached down and grabbed my hand and pulled me to her bedroom. Once we got in the room, she closed the door behind us and led me over to the bed.

“Well, aren’t you gonna at least lock the door?” I asked her.

She smirked and said, “There’s no lock on this door so you better make it fast.”

She climbed on the bed and slid over into the middle of the bed. I just stood there looking at her in disbelief.

“Well, what are you waiting for?!”

She exclaimed as she teasingly spread her legs open. Reluctantly, I started to climb on the bed. As I started up onto the bed, she slammed her legs together and said,

“Oh, no! Not like that!” 

“Not like what, April?!” I said getting annoyed.

“I’m laying here with nothing on and you’ve gotten to see every thing I have. So, I think it’s only fair that you strip down too. That way I get to see you too.”

“Fine!” I said, as I started stripping down.

I kicked my shoes and socks off first. Then pulled off my shirt, exposing my chest and abs. (I’m not in tip top shape, but I do have a six pack and nice pecs.) Then I slid my pants off. I looked over at April and she pointed at my boxer’s and made a downward motion with her hand telling me she wanted them off too. I just nodded my head and slid them down. When I stood back up, April got a good view of my hard 7.5 inch cock that was now standing fully erect. I could tell she liked what she saw by the expression on her face. I didn’t say a word, I just slid up on the bed and burried my face between her legs. She was soaking wet before I even touched her. I started teasing her by kissing her inner thighs. I could tell she was really loving it. I continued to tease for a few more minutes before I finally put my tongue on her clit. As I started to lick and suck on her sweet tasting pussy, I slid my finger deep into her hot wet pussy. I could tell she was tight. The more I licked and sucked on her clit, the louder she moaned and the wetter she got. I continued to fuck her with my fingers, first the one, then two. After about ten minutes or so, I felt her start to tighten up. She started rocking her hips up and down making her clit and pussy grind hard on my tongue and fingers. During this whole time, my mind is blown. Here I am, completely naked, laying in the bed with my face buried into my wife’s baby sister’s freshly cleaned, delicious, tight cunt. She started to buck hard and then let out the biggest moan as she came all over my tongue and fingers. I continued to lick and suck and finger her through her orgasm. Once, she was completely done with her orgasm, I raised my head up and asked her if that’s what she wanted.

“Hell yes! That’s exactly what I wanted. Thank you. That was so much better than doing it myself.”

While we were talking, I still had two fingers in her pussy. As I laid there with my fingers stuck in her pussy, I could feel my cock throbbing. I looked down at him and could see the tip glistening with precum. And then it hit me. If she snitches me out, I’m gonna be in some really deep shit. So.. I figured, well, if I’m gonna get in trouble for being here with her, then I might as well make it worth it. April, started to talk.

“Once I get dressed, I’ll come help you get the bed done. I know mom will be here soon so…..”

I nodded at her and smiled, then I leaned my head back down and kissed her clit. My fingers were still stroking her pussy. I readjusted my body and then began to slowly kiss my way up her body. I made it all the way up her stomach and stopped at her perky left nipple and began to lick and suck on it. Then I swapped and gave her other nipple a little attention. I looked up at April, and I could see in her facial expressions that she was getting really nervous. I could feel her pubic hair gently grazing my shaft. Now it was my turn! I lowered my hips down to where my shaft was laying directly between her enlarged lips. I felt her shutter under the weight as my lower body pressed down hard on her.

“Sean, what are you doing?” She asked in a quivering voice.

“April, what do you think I’m doing?”

“We can’t do that! We can’t have sex!”

“Oh really, and why not?”

“We just can’t. It wouldn’t be right!”

“And me eating and fingering your pussy wasn’t?”

“Mom, will be home at any moment now!”

“Nah, she’s gone till at least 2. So?”

“I don’t think we should…..”

“Well, it’s like this. You wanted me to help you cum. I agreed. Then You said it wasn’t fair that you were naked and I wasn’t. So you made me get naked too. Well, I don’t think its fair that I helped you cum without some kind of reciprocation. Isn’t it only fair?!”

“So what do you want me to do then?””

“You know what I want!!”

As I said that, I started rocking my hips back and forth, slipping my dick in between her now saturated pussy lips. Every time that I rocked my hips, I would slide the head a little closer to her awaiting opening. She hadn’t said a word but as I looked into her eyes, I could see she was trying to think of something to say.

“Well, isn’t it fair? I helped you. Now you help me. You know you want it. I know you want it and its only fair right?” I said.

I knew she was about to say something crazy, so as she opened her mouth to speak, I leaned down and gave her a massive kiss. And as I kissed her, I slid the head to her opening and pushed my hard member into her tight little pussy. I continued to kiss her as I slowly pressed my member deep into her wet throbbing pussy. She was so tight that I thought I was gonna cum right then. I buried myself all the way in until my balls were resting against her ass. I stayed pressed into her as I gave her a few more passionate kisses. I raised my head up and said,

“Now isn’t that fair?” I asked.

“Oh my god. You’re so big and so deep inside me. I’ve never had one that big before.”

“So you’re gonna help me then?” I asked laughing.

“Its only fair.”  She responded.

With that, I began to slowly stroke in and out of her. With each stroke, I would pull out a little bit further and then just slide all the way back in until my balls touched her ass. A few minutes of me stroking her like that and she was ready to cum for the second time. After her second orgasm, she was really wet and sloppy. I picked up the pace and began slamming my cock deep, hard, and fast into her pussy. This brought in orgasm number three. As her eyes rolled into the back of her head and she began to convulse and writhe against the pounding I was giving, her moaning turned into screaming. Hearing her moan like that, coupled with her tight, warm, sloppy, wet, little pussy squeezing and gripping my dick like that,  had me ready to blow. I grabbed her legs and threw them up over my shoulders and began to slam the full length of my cock in and out of her pretty little cunt. My balls bounced off her ass hard with every pounding stroke. I could feel my balls starting to tighten up. I looked April in the eyes and said.

“I’m about to cum!  I’m about to cum!”

She smiled at me and said,

“CUM IN MY PUSSY, SEAN! CUM IN MY FERTILE PUSSY!!”

As she said that, I unloaded my seed deep into her pussy. I felt rope after rope of my cum fill her pussy. I sprayed so much cum into her pussy that it started squirting out around my dick. As I finished unloading into her, I buried my cock deep one more time and let it marinate there. As we lay there with my cock still throbbing in her quivering mound, we kissed one more time. As I went to get up, she pulled me back down on her one more time.

“Just lay here a few more minutes! I just want to feel him inside me a little longer.”

“I think I can do that. I love how tightly you’re wrapped around me. You feel absolutely amazing. But can I ask you a question?”

“Sure, what’s up?”

“You asked me to cum in your fertile pussy?”

“Yeah, so, what’s the question?”

“I thought you were fixed?”

“No, I’m not, actually! We just told everybody I was so they’d stop running their mouth about me having kids.”

“If you can still get pregnant then why didn’t you say anything?”

“I tried to, but, as I was about to say something about getting a condom, you kissed me and stuck him in. And since you felt so good, I wasn’t gonna make you pull out then.”

“So….there’s a good chance that you just got knocked up?”

“YEP! Its a really good possibility!” She said as she smiled at me.

I was about to say something else, when all of a sudden, we heard a car door slam outside.

April and I jumped up and got dressed, without saying a word. I ran down the hall to the other bedroom and started taking the bed down, as April bolted to the bathroom to clean up. A few minutes later,  my mother in law opened the door and came in.

I finished taking the bed apart, loaded it into the 4runner, handed my mother in law the money I owed her, and headed home.

Lucky for us, April didn’t get pregnant! And to this day, April and I, have kept this secret to ourselves. She is now living with her new man. And I’m still enjoying the swinging lifestyle with my wife. I think about that day often and sometimes wonder if she thinks about too…. 

Source: reddit.com/r/eroticliterature/comments/ghddb9/sister_in_law_surprise_str8mfnonfiction