April fools prank turned into me fucking my girlfriends sister [M/F]

I'm not a great writer but I need to share this with someone

I have been with my girlfriend for seven years now, since we were 16. We have a great relationship and we have been living together for 3 years. Throughout these 7 years I have gotten to known my sister-in-law (2 years younger than me and my girlfriend) very well. We have very similar humor and I sometimes even find myself getting better along with her than with my girlfriend. At every family gathering we have always lightly teased/hazed my girlfriend together.

She came to stay at our apartment for a week back in the end of March this year, as we live in different cities. Everything was normal as it always is until April 1st, the day before she was leaving. My girlfriend was at college so I was alone with my sister-in-law until my girlfriend finished her classes in the afternoon.

An hour before my girlfriend was supposed to come home, my sister-in-law remembers that its April fools and she wants to prank her sister when she comes back. We had spent a good 30 minutes thinking and suggesting pranks to each other while watching TV on the couch when she suggests that we pretend to sleep together once she comes back.

Fast forward 25 minutes and we get into me and my girlfriends bed with out clothes on. After a couple minutes under the sheets she suggest we undress to our underwear, not only because it would seem more realistic but also because it was really hot day and we were boiling under the sheets. Like I said we are very comfortable and have went on vacations together so it wouldn't be the first time we saw each other in our underwear.

I take off my t-shirt and shorts so I'm just in my boxers, and she undresses into her underwear. She was wearing a white bra and a cute blue lace thong. It is a little awkward and we giggle a bit at first and both mention how we cant wait to see her face when she comes back. Her body is, like her sisters, very nice and fit with some firm C cups. Laying there next to her I got slightly erect, but luckily the sheets were thick enough that she didn't notice.

After waiting in our underwear for about 15 minutes or so, wondering why she has not come back yet I get a message from her saying she went out to eat with some friends from her class and she wont be back for another hour. My sister-in-law and I are very disappointed, but at the same time very comfortable in bed so we end up laying there watching TV together.

I accidentally bump my leg into her under the sheets and quickly apologize. She bumps her leg into me and says were even now. We start bumping into each other back and forth jokingly, and it quickly turns into a tickling fight. Eventually she gets on top of me tickling and her ass accidentally touches my now fully erect penis. We both suddenly stop laughing and tickling each other. Both our faces turn red and once again I apologize, saying that I can't help it laying next to a half naked lady. She smiles and embarrassingly tells me she got kinda hot too laying there next to me.

We both quietly stare at each other for about 10 seconds, before she once again slides her ass down from my belly onto my penis. I feel her warm pussy through our underwear and my dick feels like its gonna explode. After grinding for a little bit, she slides further down until her head is right over my boxers. We still haven't said a word, just staring into each others eyes as she pulls down my underwear revealing my hard dick. After looking at it for a few seconds, she grabs my shaft and gently strokes me up and down. I lay my head back on my pillow staring up at the roof questioning if this really is happening. Thats when I feel her tongue touching my balls and working its way up to the tip. She puts the tip in her mouth and I look back into her big eyes as she goes deeper and deeper.

After she has blown me for a couple of minutes, I quietly tell her I want to taste her too. She removes her panties revealing her shaved little pussy and makes her way up the my head and slowly sits down on my face. The feeling of her soaking wet warm pussy is something I will never forget, nor will I forget the sweet taste. She sits on my face and we 69 for a while before she tells me she wants me inside her. At this point I'm on the edge of cumming already.

I remove her bra and finally get a look at her beautifully titties, her nipples are rock hard and she moans as I gently suck on them. She then lays down on her back and I slowly insert my dick in her, and man is she tight. Her tits jiggle nicely as I'm fucking her pink pussy. I fuck her a while missionary before she gets on top and rides me. She is super wet and moaning so loud I have to tell her quiet down more than once. I slip a finger in her super tight ass while she is riding me and her legs start shaking as she cums. I then pull out and she sucks my dick until i bust in her mouth.

After she swallows the last drops she tells me she wants more so we go at it doggy. My view of her sweet ass while fucking her from behind was amazing, I once again shove a finger in her tight ass and she moans louder. I pound her from behind for a good 5 minutes before I tell her I'm gonna cum again, and she says she wants me to cum inside her. Hearing those words make me instantly blow my second load deep in her pussy.

We lay on our backs in the bed exhausted when we see that almost an hour has passed and my girlfriend will be back soon. We rush to the shower and I quickly clean off my dick, get dressed and go watch TV on the couch while my sister-in-law stays in the shower.

My girlfriend walks in about 5 minutes after I sat down I give her a kiss and tell her that her sister is taking a shower. A couple hours later my sister-in-law tells us that shes gonna be driving home today instead of tomorrow morning as she "has some things she need to take care of". She leaves and I end up fucking my girlfriend with my sore dick later that night.

Source: reddit.com/r/gonewildstories/comments/33q7o0/april_fools_prank_turned_into_me_fucking_my

48 comments on “April fools prank turned into me fucking my girlfriends sister [M/F]

  1. Is it the fact that I call her my sister-in-law when me and my girlfriend are not married yet? If so I’m sorry but due to how close I am to her family I have called them my "in-laws" for the last few years. My girlfriend and I are planning on getting married but we are waiting until we both are out of college

  2. We dont care that its fake, actually i hope it is and youre not that big a scumbag.

  3. what kind of person gets off trolling here and getting all judgmental on people. mind your own effin business! OP is telling his story, either enjoy or GTFO!

  4. good job cumming in your sister in law. keep it up. hopefully you will be the father of her future children as well as your wifes.

  5. Oh don’t get me wrong i enjoyed the story, it was hot as hell. I would just like to immagine that if he’s in a relationship in real life it’s faithful.

  6. why does that matter to you at all? he’s not you and he’s not your bf. he’s probably as far removed as can be from you and yet still you feel like you need to judge him. don’t get me wrong, I understand morality and what’s considered the right thing to do, but what I don’t get is how you seem to have a vested interest in someone else’s life like that. at the same time, I’m wondering how you’d react if people started judging you. hey, you went 9 miles over the speed limit today. you could have killed someone. or wow, you had a beer and then got into your car to drive, that’s not helping your reaction time. (add a million other scenarios here that might apply more in your situation). is that the kind of interaction you want from other people? what he does with his gf and her sister is between the three people involved. period.

  7. Well i dont drink but if i did i would hope someone would be around to judge and say hey, "Dont get in that vehicle". Maybe i just care about more people in the world beyond who i can directly see, is that so hard a concept to understand.

  8. There’s a difference between saying ‘hey think about if you still wanna drive, you had three beers’ and ‘wow, if you did that to your gf then you’re a douche’. Is it hard to see the difference between those two?

  9. Great story. But does it matter if it’s fact or fiction? My cock doesn’t know the difference….which is one of my problems LOL!!!

  10. I mean your possibly ruining lives in either scenario, and it was **your** analogy.

  11. ITS A SOCIAL EXPERIMENT MAN! YOUR’E ON CAMERA!! THERES A CAMERA IN THAT PLANT!!

  12. A few other things. For example, the notion that after ejaculating you went straight into more sex, which is virtually impossible.

  13. If by judging you mean praise. You the fucking man, son. Im not some asshole Baptist. Ha

  14. You’ll also want to closely observe whether they’re flushed in appearance and if fuck fumes are wafting from your bedroom. Probably the most damning sign that you’re boyfriend has fucked your sister is if his cum is leaking out of her pussy.

  15. I find it weird you call your GF sister, your "sister-in-law" you guys are married.

  16. Who gives a fuck? Did you like the story? That’s what matters. Why do idiots like you have to post on every goddamn story that they think its fake? Because of shit heads like you we are losing the best writers on this sub.

  17. People overanalyze every fucking story on this sub. It’s bizarre. It’s meant to be jerk material not fucking debate 101 for autistic redditors. I actually think the mods should adopt a policy like /r/nosleep and removed comments questioning the authenticity of the stories.

  18. Not really. Some guys (including myself sometimes) can keep going after if you keep yourself hard. Might need a minute or so though.

  19. Your girlfriend ate out with her friends you ate out her sister… good trade.

  20. Instead they believe these idiots and remove stories causing the authors to ditch the sub!

  21. lol no? especially if you are in the younger 20’s most guys have enough raging hormones to get it up again really quickly, i mean the load isn’t as big and your dick might be sore buts its definitely possible

  22. not impossible at all. i’ve done that many times when i’m really turned on. don’t need any wait time whatsoever, and it stays rock hard. lexington steele does this fairly regularly too.

  23. The whole point of this sub is that these stories are supposed to be true, it says it right there in the description. There are plenty of other places to post fictitious stories where people expect fantasy. Many people come to this sub specifically because they want realistic, true, stories that are in some way relatable. That is one reason I come here, I want to read about real people having real sexual experiences. That’s what interests us, turns us on. When the story becomes unbelievable it becomes a huge turn off. We don’t come here for the stories of, this is how I fantasized about having an encounter with my GF’s sister pretending it actually happened. Sure, we all enjoy our fantasies and fake stories, but not when they’re masquerading as something that really happened, that’s just disingenuous. Like, if people started posting a bunch of photos of porn stars in r/gonewild pretending it’s them or their SO.

  24. Yeah, but what else does it say right there in the description? That we go on the "honors system" for veracity. Basically assume it’s true. You’re assuming that it’s not from the get go, without any evidence other than a "feeling" or whatever. So as far as I can see, it’s you and your ilk that are breaking the rules of the sub, because unless the author outright admits a fake, you’re in the wrong for accusing them.

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