She has lips to cum over and a little mommy belly from having k**s. She is conservative and quite, but, damn I wanted to fuck her.I waited until I he...rd her up in the shower Saturday morning, she was the first one up. I watched her as she walked into the kitchen. She looked toward the sofa where I was, so, my morning wood was hard and I had slid it out of my boxers. I acted a asleep but could feel her eyes on me. I wondered what she was thinking. I rolled over onto my back and saw her dart. She came close to my ear and whispered, “You like that don’t you, dirty boy?”“Yeah. Yes, I – Wait. What? Boy? I am not a boy.”“If I am on top of you, you are whoever I say you are. Ok?” SLAP! “IS THAT CLEAR?”Taken aback, I whimpered, “Yes. Yes, honey.”“See. One slap and loud words. And you become a scared little boy. You don’t even fight back or resist.” She laughed.Stupidly thinking that she made her point and it was over, I tried to break free of her grip. But she nailed me firmly and said,. “Mandy did tell you we used to share everything didn’t she” kissing me softly I could feel her hard nipples against my chest “haven’t had a good fuck in ages or a decent orgasm” “well you had a nice one last night didn’t you” “oh you naughty boy you was listening, well looks like you’re going to have to satisfy me, Tilley laid against the wall opening her legs, rubbing her clit slowly, Tilley groaned “oh god yes that feels good a bit deeper with your fingers” as I slipped 2 fingers deep into. My sister was sixteen and stunning. She had long reddish-brown hair with hints of sunshine and licorice throughout. Her face was always tanned despite our family's generally pale complexion. Her breasts were small under the loose shirts she wore, but her slender body still held curves which every guy noticed wherever we went, and more than a few girls did, as well.I called her Jackie, but she rarely called me Penny, using my given name most of the time. She was an incredible big sister, looking.