That was the first vagina my cock ever visited and it was great. I did her twice before she had to make curfew.No change in how we interacted in class...though. Was I just used as a skin dildo? She would now sometimes look at me before, during, or after their screw and give me a smile. I was a bit perplexed and horny. I’d stroke my own meat as she was taking my roommate’s and cum in some tissue when he came in her.A change occurred when he was not too drunk to start fucking her but she didn’t. Soon, he grunted ‘Oh…… Oh …… Uhhh …… Uhh …… Ooo ……!’. Matt could see gobs and gobs of thick semen spurting onto the tiles. The man zipped up his pants and exited the cubicle only to find Matt confronting him.“So, what are you doing in there?” asked Matt.“You…… you were at the bookstore……” said the man.“Masturbating, huh,” said Matt as he looked at the messy semen on the tiles behind the man.“So what? There is nothing wrong to masturbate. Everyone does it”“Well, it’s not wrong to jerk off if it. I dressed Gemma in a clingy latex outfit and bound her wrists behind her back to help support the impression that she was my captive. A short chain joined the Velcro cuffs around her ankles and the image was completed by the application of heavy makeup and a ball gag. She looked like an extra from a rather extreme production of the Rocky Horror Show.I attached a leash to her collar then led her into the garage and settled her into the passenger seat. It was about an hour's drive to the car park. After about twenty minutes, she asked me if she could go to the ladies’ room and take the damn thing out so she could finish her lunch in peace. When she got up and left, I saw that the girl that was watching got up not far behind her and followed her in.It was about fifteen minutes later that the girl came out before Terry did and had her hand over her mouth laughing loudly. She sat down and whispered something to her friend. The other girl let out a loud “WHAT!!” and they both laughed hard..