After a while of silently watching we felt we should leave them to it as we wondered how we would feel if it was us. Both of us agreed we wouldn't m...nd at all, so we stuck around to watch some more. After about ten minutes, she had managed to free his rampant erection out of the front of his now opened shorts and was sucking for all she was worth on the bulbous head. This was driving him crazy and he had both hands in her hair pushing her head on and off his prick. It wasn't long before. It will be so much better too, because Aunt Fran won't be here and we won't be disturbed." We sat and watched a movie together, feeling very comfortable with each other. After all, we had a whole two weeks to get to know each other. We made our way upstairs to each of our bedrooms. Gran said, "Meet me in my room in about 10 minutes darling." I gave her 10 minutes and hurried along to her room just in my boxers. She was lying on her bed with just a black see-through nightie on, and a sexy pair. I sort of hesitated at this but he told me he saw meeyeing at him and the other boys in the school gym showers and knew I wanted to do it. I knew he was right. I had wanted to suck on all those lovely cocks for a long time so I put my hand on his cock with his sister sitting next to us. She watched me stroking her brother's cock and make it get hard quickly. Now he said to me to lick it. I bowed my head down and licked the head. I swirled my tongue around the head of his cock while she looked. . be with it I’m to sore and bruised!”The professor hugged her and said that the “Thing” didn’t want her there to feed it.It wanted her there to heal what it had hurt!!As he told her follow him as she and Andrea walked into the living room seeing his wife lay out on the couch her pussy and tits covered in a complete blue slime.This made both young women shiver all over seeing it as the professor expressed to them that was the healing stuff it had already given to his wife and for Carletta to.