Sister swap

I guess it started with a conversation at the gym. I was working out on a Sunday afternoon. There was barely anyone else there when my brother in law walks in and we start to gabbing. There was no one else in the room we were in so quickly the conversation got crazy.

He had complimented my wife's recent weight loss.

He was right, she looked better than ever. She didn't have the body of a god or anything like that but she looks good. Shelly ,my wife is average size with curves. nice round ass. Brown curly hair. I have always thought she was attractive but recently I had heard a guy in the locker room make a comment to his friend about her, specifically wanting to bend her over.

Kyle , my brother in law, kind of an average guy.
His wife Tama was cute as hell but a little bit big. Beautiful face , big round ass. Like I said , I always kind of had a thing for her, wished I could do her just one time.

So Kyle and I are talking while working out. He's always talking openly about their sex life when no ones around. He tells me that they had swapped with another couple a while back. I am immediately interested. I tell him I'd do that in a minute if I could fuck his wife but Shelly would never go for that. My wife is pretty conservative by nature and he knows it. I told him that she did let me video us one time. I knew Shelly wasn't home so we ended up cutting out early and going to my house to watch it.
He about flipped seeing my wife's tits. And what we did. As he left my house I asked him if he was going to go home and stroke off thinking about my wife,?

Fast forward to Saturday night.

My wife calls me up at work and tells me she is going to her sisters house and when I get done at work shower and come over and we'll play cards. She says Kyle has some beer here for you already. Cool !
So I get there that evening and we watch tv for a while and have a couple of drinks. Someone says let's play some cards.

We are playing different games for a while when Kyle says let's play strip poker. We are all laughing joking around. I say sure I'm in. Tama acts like she doesn't want to at first but with almost no prodding says alright and giggles. Shelly just looks shocked but says ok. (I am in disbelief)

So a round or 2 goes by and Kyle and I are without shirts.
Couple more rounds go by and finally we get to see some skin. And about this time the conversation turns to sex.
How often? How long does it last? Stuff like that.

Kyle and I are down to boxes. The girls still have their jeans on. When Tama loses the next round she has to take off her jeans. Watching her do this has been a fantasy of mine for years. She does it slowly, a little concerned that my wife will freak out I guess. I comment "damn that ass!" As her jeans come off her hips.
More talk about sex reveals that Tama likes to suck dick.
I comment that he is lucky. Shelly will, but won't finish me off.
Truthfully she has taken me all the way twice.

Kylle says Tama likes to finish him off then wants to kiss. THAT is a huge turn on for me! Another round or two my wife loses her jeans. Kyle can't take his eyes off her as she pulled them down.
He asked very bluntly at this point "does she ever let you fuck that? Tama won't." My wife a bit embarrassed cause she knows I'm going to answer ..... yes on occasion I get to fuck that and yes it is good!
As we are all naked now and the conversation is raunchy and revealing they both ask my wife if she cum when I do her ass. She is still a bit embarrassed but sheepishly smiles.

By now we are all naked and now the "size matters" talk starts. He and both stand up to show and compare. Both about average. Both girls are surprised by neither of us guys being hard. Hell I was amazed. Probably just nervous as this was new territory. Naked with another couple.

Tama laughing grabs a tailors tape from a drawer and says let's see. I tell her the only way that's going to happen is if there is no cheating. She can't measure his because she'll lie for him. Tama agreed. I stand up in front of her and measures my length and hands the tape to my wife. Kyle stands up in front of her , we are all anxious to see what my wife will do. She holds the tape up and measures his length.

Damn he has me by 1/4". I suggest measure girth. I have him by 1/8" around. Kyle and I were by now at full erection. I said we get to measure your boobs but by hand. With that Kyle reached down and put his hand on Shellys tit. And I reached for Tamas.
I thought by now my wife would put on the brakes, but she didn't. Her nipples we're getting hard and his dick was right by her face as he stood in front of her.
Tama looked up as she sat there with my hand on her tit and dick at eye level and reached for it. She rubbed her thumb on the bottom of the head.

Kyle put his hand on my wife's head as to pull her to him. She resisted slightly as she looked over at me. She could see her sister rubbing the head of my dick.
Shelly slid her youngest up the shaft of his dick. She took the head in her mouth, then pulled it out to look at me. She could tell I was excited. She did it again this time running her tongue around the head. I couldn't believe she was doing that. What a turn on. Her sister was starting to slide her hand up and down my shaft but I had barely noticed. Tama and I were both shocked to see her sister with her mouth on Kyle.

Tama pulled me into her mouth. It was hot! I knew she enjoyed giving head but now I knew how much. You could tell she liked it and she was good! Real good.
By now my wife had stood up. Her nipples were at full erection and she started stroking Kyle. He had grabbed some lotion from the table and put some on his dick so it would slide easier. He was moaning as she tugged on him. He was caressing her nipples as she stroked him. He kissed her once. And asked to bend her over.

Tama was still sucking me. Harder then softer. Sliding her lips up and down me. I reached down and punched her nipp and rubbed up. She stood up and kissed me hard on the mouth. Sloppy wet ,arms around my neck, tits pressed against me and my dick pressed hard against her.
She grabbed my face kissed me once again and asked "will you kiss me when I'm done?"
"Oh hell yes!"

Shelly and Kyle were standing front of each other, he now had a finger massaging her clit while she was sliding her hand up and down him. She was really hesitant, she said she wouldn't fuck him. Before thugs came to a screeching vault I said "let him slide it in the crack. "
She knelt down with her ass facing him. Her hands were on the coffee table. He put more lotion on and knelt down behind her. Watching this happen was making my heart race!

He rubbed her ass cheeks and started sliding his dick between them. I knew she liked it and would tell him to pinch her nipples. She would look over at her sister and I and see she was now on her knees. Sucking and stroking me.
Tama would stop occasionally to watch her husband with his dick on my wife's ass. I couldn't believe what was happening

I knew he wouldn't last long. He was pushing on her and groaning. He slid Up and down between her ass cheeks one last time. His load was coming. He rubbed the head of his Dick on her ass and let loose. Squirted on her ass and rubbed the head all over her ass.
I knew I couldn't last any longer as Tama was sucking and stroking me with fury. She pulled her mouth off long enough to look up at me and question again "you'll kiss me?"

She knew the answer as I was about to blow. Moaning and my dick throbbing she knew . It let loose. She slowed her movement down as I filled her mouth. Slower and slower till she knew I was done. As she slid her lips off of it she looked up at me. I knelt down to her while holding her face in my hands. I could see I had Kyle's full attention. I planted a kiss on her lips hard. Exploring her mouth with my tongue.

I ran my right hand down her body. When I reached between her legs she was very wet. I kissed her while rubbing her clit. She moaned a little but I pulled my finger out and put it in my mouth, and kissed her again.

By now it was very late. As we got dressed to go home , it was a little awkward. When we finished dressing Shelly and I left. It' was a quiet ride home.
When she got undressed for bed I could still see where it had dried on her. What a turn on.

I told her how much I enjoyed watching her and him play.
All she could say is "I can't believe we did that... with my sister!"