Little did I know, while that was in the immediate plans, it wasn't going to happen the way I had predicted.Midway through getting myself worked up, I...heard a knock on the door. Surprised, and somewhat stunned, unsure I'd heard that right, I waited. And then I heard it again."Who is it?" I said."It's me Mr. D. I gotta pee" said my step-daughter's friend Tammy."Why didn't you use the bathroom upstairs?" I said."The door was closed. I thought you guys didn't want us to use it, so I came down. Rachel was excited when she found out that Heather and I were boyfriend and girlfriend saying we would have to double date sometime. Rachel's mom watched every boy there like a hawk so no tried anything . I wasn't sure if she didn't trust the boys or the girls , I made a mental note to ask Rachel later. The party was OK I got to know Jack a little better and found out that he is a cool guy. He has a kick ass computer at home and he can get into any pay site for free so we set up a day that I. White lace, black lace, a few animal prints. Mostly matching bras and panties, with an occasional teddy thrown in the mix. Everything felt so... ordinary. She finally made her way to the back of the store and realized there was a curtain covering a doorway along the back wall. She had assumed it was a dressing room, but upon further inspection she realized that it sectioned off another area of displays, which included all manner of kinky paraphernalia. There were vibrators and butt plugs on end. She wasted no time shoving my cock between her wet lips. With one hard thrust, she took me to the balls. It was as if a switch in her head got turned on and she became a fucking machine. We slammed against each other like wild animals as our passion spiraled out of control. In a frenzied mesh of twisting body parts and profane filled groans, we came all over each other. I came in such large amounts that after the initial couple of spurts, the rest overflowed her vagina. We laid there for a few.