[delt]

My wife's sister married a strict Catholic who would not allow birth control. After four kids in five years, she told my wife how much she was enjoying anal sex, and was having great orgasms doing it. After hearing this, we tried it and she enjoyed it,but had to be in the right mood. Sometimes she has to get it up the rear and nothing else will do.

Our nudist friends, Rob and Betty, brought it up once when we were in our favorite nudist club. Rob really wanted to try it but Betty had no interest. One night when we were climbing the stairs to our rented rooms and as Rob was staring at my wife's naked ass, he asked if we would show he and Betty how we do it. My wife was modestly skeptical but she agreed. We had never swapped,but we had seen each other have sex.

In our room, my wife got on all fours,then dropped her head on a pillow,leaving her lovely bottom sticking up.I lubricated a small vibrator, slid it in and soon she was moaning. I cleaned off the vibrator then lubed up a larger dildo after putting a condom on it. Soon she was moaning louder, and I was hard listening to her. I turned to Betty and asked her to please roll a ribbed rubber on my ready cock. She slowly rolled it on, rubbing my balls as she did it. Without being asked, Betty grabbed the KY jelley and rubbed a generous glob onto my dick.

I climbed on the bed behind my wife and rammed my cock into her until my balls were against her wet,hairy pussy. As she always does, my wife got very vocal,saying 'F--k my ass! Oh God, he's in my ass!". I banged her as hard as I could, how she likes it when we do it up her butt. Soon,she lets out a low moan, almost a purrrrr,and says she cannot stop cumming. I begin to shoot my white goo into the rubber,then slowly pull out. She just collapses,and looks at Betty and says" You don't know what you are missing!"

Rob is standing beside Betty and has a large hard-on. We talk for about a half hour and Betty still says she will not do it.Finally, she looks at my wife and asks her if she will let Rob screw her ass. My wife asks me what I think and I tell her it is ok with me. Minutes later, Betty has my hardening cock in her hand as we both watch her husband slide his cock,now in a french tickler, up my wife's anus. His dick is thicker than mine, and she says she is being stretched too wide but soon he is pounding away and she is yelling again "he is up my ass".

I stand, and Betty keeps yanking on me as I move toward my wife's face. I had hoped to cum in her mouth or on her face,but her face is buried into the pillow,trying to quiet her yells. Soon I shoot into her hair,just as Rob cums up her ass.

We have not done this again but we have talked about it often. The next day as my nude wife walked around the nudist club,I wondered if anyone wondered why her bottom was so red?