I fucked my girlfriend’s sister! [MF]

Well I’m unable to tell my friends this story because they’re all fucking loud mouths lol and it would get back to my girlfriend! So I’ve been unable to tell anyone but my brother. Long story short been dating my girlfriend for 2 years and I see her 22 year old sister all the time! I’m 26 and my girlfriend is 25.

Sooo throughout my relationship I’m obviously at my girlfriends place a lot and got to know her sister very well! And fast forward to a month ago. They share an apartment that their parents own. Soo my girlfriend was partying at her friends place to celebrate her friend getting a new job! I figured she would be back around 11 so I just walk into her place like usual and it’s just her sister watching Netflix in the main room. I was surprised because I didn’t expect her to still be out. Her sister explains her friends want her to stay longer and she’ll be back at 2 am. I turn around and begin to walk out the door and the sister says “Want to watch dexter”.

Not to get side tracked I fucking love that show! And of course she’s on season one the ice truck killer. So I’m like fuck I’d rather dexter it up then drive 30 mins back to my place.

And so the night begins. We start cruising through the first two episodes. And she’s the type of Netflix watcher that bogs the other watchers with all types of questions, but what the hell I basically give her the low down on each character, so she’s not completely lost. Soo halfway through the third episode of the night I get a text from my girlfriend “Hey honey I’m going to sleep over Sarah’s place I’m really drunk cya tomorrow”. So I relay the info to her sister and tell her I guess I’m heading home. I make a stupid joke like tomorrow I’m going to quiz you on the show lol. And she says, “just stay for a few more episodes, it’s more fun to watch this with someone plus dexter scares me”?!

Well this is the classic Angel and devil on the shoulder moment. At this point I didn’t think she was coming on to me so I reluctantly say sure. Plus she offered some tequila. And I still stand by the theory turning down drinks is a fast way to hell lol so it definitely helped the decision. We start drinking it up and she keeps wanting to take shots lol! Which in any circumstance I’m down, but I know I’m going into untracked water and it’s definitely crossing a line in my relationship. After 5 shots and more dexter, i tell her I need a smoke and head outside on their balcony. This is where I’m trying to think about what to do. I’m most likely over the limit to drive and this is for sure starting to feel not cool. And about a couple months ago my friend got a DWI and it fucked his life up. So ultimately, i just succumbed to the idea to keep drinking and not risk getting arrested. I live in an area with a shit ton of cops!

So I head back inside and she says that Masuka guy is hilarious in the show ?! She just named my favorite character, I’m so fucked haha! So the drinking keeps on rolling. We hit around shot 10 or 11 and were both definitely feeling quite drunk. This is right around the episode where dexter follows a random van and the driver throws a head at him! She says I’m cold I’m going to throw some pajamas on. Alarms start to ring in my head, this isn’t good and I’m on the fast road to mistakes. She shows up 5 mins later in essentially less clothes then what she was wearing before lol. She had a sweater on with shorts before, now she had skin tight pajamas and basically a shirt with no sleeves that exemplified her boobs.

We continue to watch dexter, and In my head I just keep repeating “you’re a dumb fuck” over and over and over. I totally put myself in this compromising situation, I’m a fucking idiot! We take one more shot and she stands up to grab this dope blanket it’s like fake fur but it’s comfy and tosses it on both of us. Now at this point I really don’t know what to do. I’m pretty drunk, can’t drive. I could call an Uber but I’d have to leave my car. My girlfriend would be sooo confused and sketched out by that. I’m fucking lost at this point. Soo I just say fuck it guess I’m drinking and leaving early in the morning. She takes a break to hit some bong rips and I’m just railing tequila. I’m at probz 15 shots right now. I’ve basically given up any chance to think straight, which I guess never existed at any point in the night ?.

Now at this point were both pretty messed up. I’m very drunk and she’s defiantly more high then drunk now. I guess I should of smoked idk.
We continue watching dexter and when she sits back down on the sofa she essentially sits right next to me. Up to this point we had at least a few feet in between us. At this point, I know I’m fucked I’m going to cheat. I always said cheaters are fucking losers I would never do it so on and so on. But here we are, I’m wasted at my girlfriends place basically cuddled up with her sister. Ya I’m a fucking hypocrite I guess. Soo we keep the show rolling and about 25 mins into the episode she starts resting her head on my arm. God daaaaamnn it. I just keep staring at tv and try to not pay attention to it. Then she asks me more random questions about dexter in a super high voice “Wait sooo Dexter was an orphan”, Naah his mom died and he was adopted by Debs dad, ohhh gotcha! We continue on with the show and she keeps moving her head on my arm! And then I feel her hand on my leg under the blanket. Yup game over I’m fucked. Im a piece of shit this is sooo bad! I’m basically screaming at my self in my head!

Well going into that night I was planning on getting laid so I was already kinda horny prior to even showing up to the apartment. Sooo the mixture of a hot chick and tequila, I got hard very fast from this leg rubbing lol! She keeps rubbing my leg slow and ultimately she realizes I’m hard. She lifts her head and smiles at me and says I see you’re happy ?. I said yes I guess I am lol . She moves her hand over to my crotch and we start making out.

Let’s just say the sister is far wilder then my girlfriend. She was ripping off my clothes and instantly started giving me head mixed in with a rim job! We 69 for like 10 mins then I start to do her doggystyle and mix it up! Then I busted a huge cumshot all over face and tits! She definitely rode my cock like a champ. We hooked up till sunrise. Then I got dressed and headed home. I saw her later that day lol it was like nothing happened!

For the people who are going to ask, the sex was better with her sister like a lot better lol. And do I feel bad. As a person I feel like a total fucking asshole. I have no one to blame but myself and bad karma is for sure coming my way. But the sex was amazing lol so idk I don’t regret that. The sister and I never spoke of it at all in the coming weeks. Until about 2 weeks ago she made a joke and said want to watch dexter season 2 next weekend and smiled lol. I’m still dating her sister not sure if I’ll ever fuck the sister again but I already fucked up once so who knows lol. Hope everyone is doing well during covid and have a good holiday season!

Source: reddit.com/r/gonewildstories/comments/jqk9yk/i_fucked_my_girlfriends_sister_mf

28 comments

  1. “Well this is the classic Angel and devil on the shoulder moment.” I haven’t had one of those in awhile. This is what keeps life interesting… to me at least…

    “Yup game over I’m fucked.” LMAO. That was a good one!

  2. Great job telling the story! I’ve had that Angel vs Devil debate in my own run- in with infidelity. Reddit is the only place I’ve told my story as well haha. I can only describe it as a slippery slope where at each stage i told myself we could stop.

    The ups and downs of feeling guilty one moment then lusting after my fling again were a roller coaster. Feel free to DM me if you need a stranger to talk to

  3. You need to dump the 26 y/o and fuck the 22 y/o like you both need.

    If you have a 4 year old Ferrari and can trade up to a new one, you are silly if you don’t. You are only young once. Bang the crap out of both of them, whatever. You have the rest of your really currently young life to be a respectable adult.

  4. Way older than you dude. Wait till the devil on your shoulder asks you “do you really want to do that”?

  5. That girl has serious issues. Who would fuck their sisters boyfriend? Gross. Your girlfriend WILL find out. She’s going to feel absolutely horrible. She shouldn’t because both of you are fucking trash. I can’t believe people ruin relationships over sex. Sex. For God’s sake. ?Fucking jerk off. You’ll save a lot of hurt feelings.

  6. Wow. I think it’s all Cool if you fine with the gf doing the same thing . Or Maybe try open relationship?

  7. Convince the sister to plan a threesome with your girlfriend.
    That’d be some hell of a story.

  8. Voice of experience here….If you and your girl stay together and maybe one day marry there is a 99.9% chance she is going to find out that you two did the deed. Sooner or later they will get in a serious argument or there will be a very emotional family event and little sis will feel she has to confess what happened. You were a conquest for little sis and it doesn’t really count until everyone knows about it.

  9. I could’ve had my 19YO SIL when I was 31 and didn’t make a move. Worst decision ever since I found out later that my wife was fucking her boss. My wife was average but her sister was Penthouse Pet material and super sexual. I could’ve went from one to the other and maybe had a good relationship with her.

    “If I could turn back time” …

    Fuuuuuuuuuuck !!!!!!!!!!!!

  10. This may be the best story I’ve read in a LONG time I was legitimately laughing out loud. Great story my dude

  11. Bro wouldn’t worry about it. Heck this is the type of story you tell your great grandkids someday lmao

  12. I personally think she set it up. She basically doing netflix and chill on you, bruh. You got play lol.

    You better hope that she didn’t get an argument with your sister on day as sibling sometimes do and blurted out that i fucked your bf and he like it.

    Your going to be sitting at jail house.

    I think it best not to do it again with her. If you wanna cheat, do it far away. Dont shit and eat at the same place.

    BTW, hot story though. Bet you bang her few till dawn to get sober ??

  13. Mate loved this. Was laughing while I was meant to be working. You never stood a chance when she came back in with the pyjamas ?

  14. It’s not like cheating twice is a lot worse than cheating once. You’ve already crossed the “if she finds out I’m fucked” bridge so have fun with it, I bet the sister is even better sober

  15. Even though you kept telling redditors that you felt bad about what you did, your tone sounded very exciting and probably could not wait to do it one more time. You are one of those fuckers who would blame the situation but not yours. If you had known the limits, you wouldn’t have done so.

  16. > …then her sister came on to me, so I ran outside. My girlfriend was waiting right outside the door. “Honey, we set this up as a test, but I knew you’d do the right thing!” Moral of the story? Keep your condoms in the car!

  17. It happened with my wife’s sister. I should say ex-wife. By the time it happened, we were done. But still entangled in certain ways. Her sister, who I was strangely a lot more compatible with, was coming on to me. At first, I thought I was misreading things. But then I realized what she was doing. I couldn’t resist. We ended up having an affair for a year and a half. The family figured it out, I think. They are Brazilian and I think they had this chill attitude that these things happen. I think they wanted us to get together. Honestly, the wrongness of it on some level, probably mixed with a passive-aggressive revenge ploy, motivated it a bit. Though I was truly in lust with her.

  18. I can’t believe I’m going to be That Person right now but if this is real for the love of god dump your poor girlfriend. You and her sister clearly don’t give a shit about her and she deserves to be with someone who does

  19. You gave more detail on dexter thru the whole story. Than the sex scene on that little paragraph.

  20. Here’s what I think and because of the beauty of the Internet you don’t have to listen to it.

    You’ve done it once, you said it was 100% worth it and you would do it again. You’re stepping on the slippery slope of looking for opportunities to do it again. I’m not your parent or in charge of you but be careful you don’t ruin a lifelong relationship with the sisters. Stay safe

  21. I keep getting DMs from guys wanting me to cuck their girlfriend I’m good for now haha ?! Two sisters is enough for me thanks tho!

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