So my wife and her "new" friend (ill call her Rachel) asked us to go out to a "play" that she said was fun and that we would have a good time. Which sounds great except her friend is kinda alternative and very sex oriented. Always pushing it on us, telling us we are prudes.... teasing us and sometimes touching us In sexual ways. I always play along and I know she is just playing but sometimes I get aroused when she does these things, but I dont show it and hell no my wife doesnt know. So anyway, she ask us to come to this one person erotic play. Its just a girl telling stories about sex and people listening. So we all go. My wife is on my left with her girlfriend on my right. So the pLay starts and this super cute girl is writhing around on a stage couch and touching herself and hissing out the hottest story I've ever heard in a theater. I feel my penis swell and grow hot against the inside of my thigh. My girlfriend squirms and laughs at the girl onstage, who now has her legs spread pulling her hands down deep into her crotch. The girl onstage balls her fist into her crotch and rolls over on all fours her face in the pillow and her cute.butt stuck up in the air. This action must of touched Rachel deeply because she grabbed my leg. And I'm not talking my knee, she grabbed my thigh, her finger tips touching my swollen shaft. She then quickly let go. My wife then put her hand across my other leg and leaned into against me, her head on my Knee rubbing the underside of my legs. I leaned back a little to relax as I felt Rachel's hand moving down my thigh. Without anyone noticing she squeezed my cock over my pants, then began to softly stroke it as I could feel the heat build against my thigh. I love my wife, but I was in heaven and i guessed she couldn't see what was happening. Rachel formed her hand along the length of my shaft and began to rub me off very quietly, hardly making any motion and showing no attention to what she is doing to me. The girl in the play took more clothes off as Rachel increaseed the pace of her hand stroking the length of my dick. My wife was right in front of me and it only took about 30 secomds as I began to feel an intense heat build in my butthole. I start to squirm a bit and grind my hips but Rachel keeps stroking and within 30 seconds Rachel has me shooting stream after stream of hot cum into my undies. She takes no notice and pulls away like nothing happened. 2 minutes later my wife feels the wet spot on me.