Then she looked at me and wanted me to come in front of the classroom to demonstrate the walk in 6 inch heels. i stood up carefully and walked in fron.... She said, that i must have been well trained for walking in this shoes and asked me how long i had been in this heels. i responded with: "2 years Mistress" Oh i see. and why are you here in my classroom, when you were trained for this so long ?" To learn more for my Master" i said. "you are a really obidient slave for your Master," she said and. "It's an expanding cock. I can widen it from its normally erect two-inch diameter to four inches. And lengthen it correspondingly."I could feel the depth of penetration increase as the cock within me swelled up. Deeper and wider. That cock of hers was a damned sight better than my own equipment. One of these days I'd have to ask if I could be retrofitted with one of those."Variable width and length -- that creates some intriguing possibilities, wouldn't you say?" She chuckled, and I felt her. I still need that sample.”“Yes, Nurse Craddock.” I tugged on my cock, staring at her, at the irregularities in her dress caused by stiff nipples. I wanted to see them, her breasts, her nipples, for real. She was working her fingers with intent, her pussy squishing loudly. I found myself feeling a bit desperate. I didn’t want to just stand here and tug myself. “You’re so hot and sexy, Nurse Craddock,” I said. “Please let me fuck you.”Mrs Craddock smiled. Was that a sign? “I’m a married woman,. It kinda startled us as we forgot he was there.After a couple giggles, she asked me if he heard us, and I said if he did hes probably gonna go back to bed and jerk off. When I said that Carol got this gleam in her eye, and said that the thought of someone listening to us have sex and masturbating was pretty hot. I put my finger in her pussy and she was a lot wetter than she was a minute or so before, and to be honest I felt something also. All of a sudden I think both of us at the same time.