I just nodded my head yes then she dropped her robe. It was a cute one-piece swimsuit, with a hole exposing her belly button. I just looked at her. Sh... let out a sigh and sat down next to me.She was silent for a few moments and without looking at me; she started to say, "I'm sorry I didn't realize your feelings for me. If I had, I probably wouldn't have done things the way I had." She put her face in her hands. "I'm also sorry that I don't exactly know what my own feelings are at the moment. I. Then, just as i was about to shoot my load, she pulled my cock out of her mouth and slid them between her big soft tits. She was a pretty small girl but for some reason she had huge wonderful tits. I loved how good her big soft tits felt wrapped around my dick. I quickly shot my load between her breasts and up on to her face. She wiped it off then sucked it all down. before i knew it she was on top of me again but she had slip my dick inside her wet pussy. She rode me so hard i half passed out.. "Oh!" she moaned. "Please don't! I'll be better! I promise, master!"One last crack. My hand left her ass. I watched the puckered lips between her thighs and thought, it would be so easy. My dick hardened in my pants. I growled, and took my hand off her shoulder. "Just stop," I said.My sister demurely swept her skirt back over her ass, stood to her full height, and meekly adjusted her cap. "Yes, sir..." she said, averting her eyes. Fifteen minutes later, she dropped the fucking pan again.This. I never knew for sure, but I thought it likely that during our separations she went to bed with other guys, but so what, my bed didn't stay empty either.In our last year Sandy started making marriage noises. What kind of wedding should we have, should we keep it small, would it be best to wait until we were established in our new careers and stuff like that. I don't know if Sandy noticed my silence on the subject or not, but the truth was that I really wasn't ready for marriage. I'd seen what.