Last weekend my sister in law had a house warming party. Things were going great until two couples started arguing. It got heated enough I thought it was going to get physical. Eventually some of us stepped in and got them separated and calmed down, but it killed the mood so the party broke up kind of early, like around 10:00.

Both my wife and I were just drunk enough neither of us wanted to drive home. So we planned on staying at her sisters. It was still early so we decided to stream a movie or two. Without thinking I sat down in her sisters fsvorite chair. When her sister came back into the room with some beers and popcorn for us, she hands both of us a beer and plops down in my lap. I'm like "ok, ok I'll move." Her sister says "nope I'm comfortable just like this." I look over at my wife in a silent plea for help and she just says "that's what you get for sitting in her chair. Now shush and watch the movie." Before long her sister starts wiggling and of course she's right on top of my dick. Of course the inevitable happened when an atractive woman in a skirt sits on your lap and wiggles. She adjusted her self so the tent in my shorts was rubbing right on her crotch. Her sister has always been a tease, but she had never taken things quite this far. She started sliding back and forth essentially dry humping me. So I tell her "no seriously enough let me up." She laughs and tells my wife "I think I just gave your hubby an erection and it feels like a nice one too. You should take him into the bedroom and take care of it for him." My wife just gets this evil grin on face that she gets when she's feeling mischievous. "You got him hard, you take care of it." My sister in law was "for real??" My wife just said "Yep, for real"

My sil didn't waste any time. She slid off my lap, got in front of me and removed my shorts and underwear. She starts sucking me. I hear the movie stop and I look over at my wife. She's staring at her sister sucking me with one hand under her skirt. After a minute she stops sucking and tells me to lie on the floor. I comply and look up to see her removing her clothes. She lowered herself over my face and I started to eat her. After a bit I glance back at my wife and see her panties on the floor. She was now squatting on the floor to get a better view of me eating out her sister. Her skirt was hiked up and she was furiously working her clit. I went back to eating her sister. Before long her sister had her first orgasm. She got off of me and when she did I hear my wife tell me to fuck her from behind. Ok who am I to argue. Her sister gets on her hands and knees and I get behind her. My wife tells us "spread your legs father apart. I want to watch." Next thing I know my wife is laying on my legs and look up. Grinning at me. I enter her sister slowly at first and give her a few slow strokes before I pick up the pace. Her sister is moaning and her breath is coming faster. Her sister screams at me "harder, slam that cock into me" I start just pounding her hard. I hear my wife moaning under us. Before long her sister lets out a load moan. Her pussy squeezes me hard and I feel her drench me. She slides forward and just kind of lays there panting. My wife slides off my legs. I lay down on my back to catch my own breath. Before long her sisters on top of me riding. After a few minutes I'm getting close and giver her sister warning. My wife tells me "she's on the pill. Fill her up my husbsnd." That sent me over the edge. I came hard. I shot five or six ropes into my sister in law. She just laid on me for a few seconds. When she got off of me her pussy was dribbling some my cum. My wife surprise both me and her sister by coming over and sucking up the come that dribble on to me and the sucking the cum coming from her sister.

Afterwards I lean back against the couch and my wife comes up and snuggles against me. My sister in law says "Don't misunderstand me here. That was fucking awesome and I really really want to that again sometime, but what in the hell just hsppened?" My wife sits up and says "I don't really know. When I told you to take care of him I originally meant to ssy it as a joke. I just wanted to see the look on both your faces. When it left my lips it came out serious." She then added with a big grin "and yes we are definitely doing this again, but we're not finished yet for tonight." With that my wife started stoking me. I ended up fucking my wife while sister watched.

Fast forward to today, my wife texted me at work that her sister was coming over tonight. I can't wait.