Two Sisters

My gf wanted to go clubbing with some friends, two of which are sisters. The youngest, had already been at the club with another group and was trashed by the time I got there. I over heard her telling her sister that she met a super hot guy friend with a huge cock. My gf was using the restroom at the moment. When her sister asked how she knew, she responded she felt him up on the dance floor. A tall man appears behind them, embraces the younger sister and she starts to laugh. We were just talking about you she says. He grabs her hand, they make out and then disappear into the crowd. His hands on her hips, she’s giving a sexy walk in knee high boots. I look at her older sister, she rolls her eyes and tells me her sister is so drunk she won’t remember anything. When I ask why, she tells me it’s not the first time, she likes to get real slutty at the club. I’m a bit turned on now thinking about her. The outfit she was wearing was revealing, something you would see a bottle service girl wear. Short black mini skirt and top with a really low cut to reveal her tits. We regroup with my gf and other friends no one seems to ask where she is. The club starts to get really packed and the girls want out. I’m a bit bummed, frustrated that my gf wanted to keep things modest while I have a good hard on. My gf makes me volunteer to go find the younger sister, no one wants to weed through the dense crowd. I search and find her getting felt up by two guys in a corner far from where the group was. One was fondling her tits, while the other was squeezing her ass lifting her skirt up and exposing her panties. I watch and slowly feel myself jealous and angry. I break them up and tell them it’s my sister. The guys not very happy question me, but back off when I mention her sisters name and trigger an annoyed response from her. I pull her away and ask what happened to the other guy she was with? I can smell the alcohol on her breath, she slurs, he left me with his friends. I think he was married ugh, he left me so wet what an asshole. Are you one of his friends, your kinda hot too. I look around and don’t recognize anyone. The club is so packed and dark. My impulses take over, I keep asking questions and slipping my hand down her ass. The conversation turns sexual, she’s complaining about not going home with a hot guy. I’m not sure if she can feel me but my hand is directly underneath her pussy. It’s a furnace, she’s practically soaked. I knew I had a few minutes. No one is paying attention to us, I spin her around, we dance until I’m can’t help it. I bend her over and watch her shake her ass until i blow a load in my pants. Then we regroup outside like nothing ever happened. The next day she had a massive hangover. My gf and her sister as well.