Me, male 20, her female 22. Every year I attend my best friends 4rth of July party and it's a blast. Everyone drinking, dancing, lighting of fireworks just having a good time. Anyways my 3 friends and I spend the night at my friends house with the party just for convince. I'm not a drinker so I didn't partake in the drinking. After the party died my friends and I went to the basement to go to sleep. In the middle of the night I leave to go upstairs to go to the bathroom. When I get up there my best friends sister was in the kitchen drinking a water, due to drinking. I say hi and go to the bathroom. When I get out I notice she is at the end of the hall drinking the water on her phone. I walk past and say goodnight Olivia! However she responds with I'm not tired at all. She says that she doesn't feel good and would like me to make sure she gets in bed ok. So I do, she makes me grab her hand and lead her up to her bed. Once their she lays in it and asks if I could stay with her for a bit. I do, I lay next to her and she rolls over towards me and puts her arm around me and begins kissing me. Within seconds she has her hand on my cock and she's jerking it off. I take off her clothes and begin fingering her and sucking on her breasts. She then proceeded to suck me off and then she says I want you inside me, I don't have a condom and me so she goes into her brothers room (my best friends) brings one back and rides me for a very good 10min. We do missionary after until she cums. I pull out and rip off the condom and finish off on her face and in her mouth. After she went to clean up and we both did together in the bathroom naked where she kissed me Goodnight and told me to go back downstairs. Honestly one of the best I've ever had.
Source: reddit.com/r/gonewildstories/comments/3c6iny/i_got_with_my_best_friends_sister_of_the_4rth
I was expecting the end of this story to say "I have so much regret/I just ruined my friendship." I was wrong.
I keep reading that as "firth" instead of 4th.
one piece of advice, do not tell your friend about it –