I brushed my hands over it."Maybe our Heather is a slut after all with her shaved pussy?"She shook her head no again but I wasn't buying it.I slipped ...ne finger inside the folds of her pussy and felt it wet there. I pulled the finger out and held it under her nose."Then what's this then?"She glared at me and I sucked the juices off my finger. It tasted heavenly. It was time.I knelt next to her chair and parted her moist lips with my fingers and slowly slid one in. I moved it around, lubricating. It's pretty brilliant, really. I use it to study sexual self-control. The device can recognize whenever you have an orgasm." You picked me specifically?" Of course. This study is about the ability to resist orgasm, so we picked a young lady in her sexual prime who was, shall we say, a slut."Cassandra stuttered."Don't think I don't know of your sexual activities," Dr. Smith continued. "Men, women, gangbangs, all of it, and multiple orgasms every time. And you masturbate nearly twice a day.. God, I hated swallowing my ex-husband's cum; now I couldn't get enough of it.I slowly crept underneath the sheets like a hungry school girl and found what I was after. The most beautiful piece of cock, I've ever had in my mouth. It just happened to belong to my beloved son. My fingers slowly wrapped around his cock lightly pressing against it. I didn’t want to wake him until I had the chance to wrap my mouth around it.So there I was, my fingers gliding up and down his cock ever so slightly as I. There was so much she almost gagged but managed to swallow it all. As Chris and Tony came together, it set off another orgasm in Julia. Spent they all collapsed on the bed, Julia being sandwiched between Tony and Chris, with Colin splayed out beside them. Chris was the first to stir as he moved off Julia. Julia wanted to move but had nowhere to go with the guys on each side of her.Chris moved and pulled her on the bed, then positioned himself between her legs, eating her pussy out, paying.