She began to Stroke my cock from the base of the shaft all the way to the tip faster and faster. she began to moan louder and louder. i could feel her... little skirt against my hard cock. I shouted out "I'm cumming" so she pointed my Cock down and i came all over her sexy legs. She got up and grabbed the paper towel and cleaned herself off, then handed it to me. "Thank you" I said She said "you're welcome. its getting late. i have to go to bed early" "then i'll see you in class. goodnight" I. I could also feel the fine hair running in a thin line from below her belly to the waistband of her boyshorts.Unconsciously, I began twirling my fingers around a few of the longer strands of the fine hair. My cock began to grow and before I knew it I was rock hard. My boxers was one of those with the slit down the middle, and I was worried that my erection would soon find its way past that slit and into open air, and my sisters view. I withdrew my hand and thought it best that I concentrate. We got sufficiently loosened up and pretty soon we were telling sex stories. Kind of truth or dare, without the dares. Kate shared the story of the time she was giving me a blowjob and her other sister Jennifer walked in the room. She was mostly covered with a blanket. I came in her mouth and she was trapped. Typically she didn't like to swallow, but she was forced to.Finally the girls started sharing the stories of the best sex they ever had. Kate went first and shared about her and her most. The girl with green eyes cheerfully pipes up, “Evie, don’t forget to get your cell phone from Professor Magnus’ class or you won’t get it back until after the weekend!” She lets out a giggle and shifts her weight to one leg - I notice her breasts bounce ever so subtly in her blouse. The other girl points up the hallway to the last room on the right, “I think you can catch the Professor before he leaves, he has extended hours on Friday. We’ll see you later!”As I look back from where she was.