Lucy rapped on the door twice hoping to hear no reply. As soon as she smacked the oak door a second time a soft voice from within replied, “Come in,... Lucy, and shut the door behind you. I’ve been expecting you.” Lucy paused and then shut the door behind her. “Have a seat,” the professor instructed motioning to a black leather chair in front of the desk. Lucy looked up to see Dr. Thacker seated behind a large wooden desk her elbows rested on the top of the desk. Wisps of blonde hair fell out of. Kitty finally gets a killer body and she gives it to another girl? I was actually jealous of my sister for having sex with another girl.But I also remembered that glimpse, and I'm sure Kitty had hid something down low, perhaps under her bed? I needed to bide my time until I could snoop.It took a few days, but a lone shoe box under the bed (when all the others were in the closet) was easy pickings for me, and when I opened it, I got another shock: Kitty WASN'T a virgin anymore, or more. “We’re not going to do everything,” she said, her voice smooth and reassuring. “We have to save that for later. But we can be together, like I’ve wished we could be together for a long time.”“Together?” I panted.“Just touching ... kissing.”I was sold. If we weren’t doing everything, then the pressure was off. To be honest, I wasn’t so worried about the morality of what was going on. Granted, her parents (and mine) would be furious if we were discovered like this, but my real concern was that. There he stopped, allowing her to adjust to his presence.“How’s that feel, baby sister?”She sighed, “It feels absolutely amazing, big brother. It’s everything I hoped it would be and then some. I want you to fuck me until I beg for mercy!”“I’ll do my best.” He let her legs drop from his shoulders, stretched out on her sweet body and began the instinctive dance, easing slowly out and pushing in with some authority, but not too hard or too fast. He loved the feel of her firm tits mashed against.