Not sure if everyone in the lifestyle is like this, but we have let call them normal friends we have known for years hang out, go to dinner etc.... basically nothing sexual. Then we have our friends in the lifestyle that we have fun with sexually etc ....Well since we like to keep them separate that changed on vacation by accident because me and the wife and our friends all went out drinking. The wife had on a tight little tank top and these little white shorts. We were talking and told her I would love to see a guy put his hand down her shorts and she said she was wet but we are with friends so not here. Fast forward to around 1 or 2am and we all get back to our Airbnb. Me and couple friends are she having another drink bullshitting in kitchen and wife comes downstairs in her bathing suit and said she is going for a swim. After maybe 10mins or so I decided to join her, so I go out and just take my shorts off and jump in with my boxers on. We are flirting and she has her legs around me and such. I tell her to take her suit off and she says no our friend are right inside the kitchen. So I say they are not coming out they would have already and it's late. So after a few mins she smiles slides her suit off and says I have to eat her out on the side of the pool. I grab her and she slides my boxers down rubbing my cock as I finger her pussy as we kiss. I then grab her hips and lift her out of the water on to the side of the pool and start to lick her pussy as she leans back some. After a few mins I hear sliding door open and our one friend steps out and he immediately says I'm so sorry I didn't know and my wife said it's ok and tells me don't stop. He goes to go back it but kinda stops and is watching. I continue and notice he starts to walk over to us and I'm kinda nervous actually and after a moment I see my wife grab bottom of his shorts and kinda tug at them. He looks at me I just kinda shrug my shoulders and continue and he then took his shorts off. He was pretty big and hard already and my wife grabs him and start to jerk him off. I pull her back into the pool and tell our friend to sit on the side now and my wife start to suck him off. While she is taking care of him I slide behind her and start to fuck her from behind. Not long and he cums in her mouth. He is just watching us again and I see him rubbing his cock getting hard again. I ask my wife do you want to fuck him? She says ok if your ok with it. She hops out of the pool and starts to ride him. I'm watching her riding him so hard her tits bouncing as he grabs them. He says he is close and she says to cum in her. So she stands up and he is laying there and is like did this just really happen? I laughed and said yep keep it to yourself. I tell my wife to go upstairs I'll be up to finish so she grabs her suit and wraps a towel around and heads inside and so does he.