Sometimes he also realized that he was being silly but he could not shake the ideas coming in his mind and think of something else, when he sat in the...lecture or in the laboratory with the Professor. He was not sure if the Professor was gay or shall he be able to fuck the Professor in his ass. “Harry, is everything ok with you”? Professor’s husky voice brought Harry back to the world. He could feel the hair stand on the back of his neck with a rush of blood in his groin making his cock jump in. " Mark’s eyes immediately began lighting up. "Really, mum. That is something I would love to do. I have never been inside a lingerie shop before." Shhhh...." I cautioned him. "Go easy on calling me mummy in public. People might find it kinky to see a son helping his mother select her underwear."Walking inside the shop, we discovered it was tastefully done up in pastel shades, and the displays were mounted aesthetically. Seeing me, an attractive, middle aged woman came up to us. She must have. I was laying in bed. My wife was lying next to me in bed. Knowing that she was wearing nothing but shorts and a t-shirt, no bra or panties did nothing. It never did. I hadn't been sexually aroused by her in years. What was doing it was hearing my step daughter in the other room breathing and lightly snoring. Because I knew what I saw the night before when we celebrated her birthday. I knew what she'd done the night before. And I couldn't stop thinking about it.My step daughter had just turned. I was curious and jealous and a queer ball of emotions all on edge. I was interested in if my plan worked, and hoped it did to see if there was any effect on Jake, but I also was insanely mad at the thought of Jake getting intimate with my sister Jen. It was weird; I know she'd fucked guys before, and that she'd had a boyfriend, but once I had gone all the way with her she kind of felt like she was mine. Like I'd claimed her and Jake was stealing from me. Stupid and sexist, I know, but.