I am not wasting my time either. Can you answer?”So was she, “Yes, the level of the lake goes down. I can also state and prove Pythagoras theorem ...f you wish,” she snapped.“If it is geometry you want, try this,” he said, “Prove, on the board there, that the radius of the incircle of a triangle is never more than half the radius of the circumcircle.”Sharifa stared at him and thought for fifteen seconds. She stood again and walked over to the board.“The proof starts thus:...”Half an hour later. Please fuck me daddy. I was happy to oblige so i got up and turned around so that she was under me. Take your shirt off baby, I wanna see you little titties while I fuck you. She complied and I knelt down between her legs and positioned the head of my dick at the entrance to my little girls cunt and teased her pussy lips with the head of my dick. Oh daddy, dont tease me, I need your cock inside me, Please Dadddy? Fuck your baby girl please she begged. I loved it when she begged like that, so. . Then he cums. I can feel Bill's hot sperm flood inside of me. One spurt, two, three, four spurts, five hot spurts of my brother-in-law's cum, deep into my pussy, washing over my cervix. And now, as suddenly as it began, it's over. I'm flat on my stomach again, this time with Bill's cum dribbling out of me. The bedsheets are a soaked, sticky mess of cum and pussy juice. Oh my God, I think, I just fucked my brother-in-law. We lie there for a few minutes, panting together, listening to the quiet. He was considering joining the army, and that didn’t sit too well with Sally, but she wasn’t going to sweat it. Even if he left, she figured she’d have her pick of any number of guys from the beach. Too bad, too, she’d been thinking about giving it up to him soon. He was cute, but if he was more interested in the military than her, then she wasn’t going to go out of her way to entice him. Before this particular guy, Sally had had three boyfriends, and she’d eventually gone all the way with each.