“You are such a slutty girl,” I whispered in her ear. She whimpered at me.“Yes, I am,” she replied. “I've wanted you cock in me all day.”I... looked out of the window. Everyone seemed to be well away from the back door of the house. It wouldn't last long.“I can fuck you now but that means my cum would be inside you all the time we were at the barbecue.”Once again my sister whimpered. “Bend over the sink and keep and keep an eye out the window and I will fuck you now.”“Oh God, really?” she cried. The problem is, Marnie, also sixteen, is damn cute, too. I can't help but look at her without entertaining the possibilities. Curly red hair, somewhat provocative dress, curves in all the right places, freckles and a sassy attitude to go along with it.Just last week, Morgan had called off school. Marnie came to the house, asking if she could spend the afternoon. She said she needed some help. I saw no reason why not. Marnie was sitting at the dinner table, her homework spread out in front of. Then she went on to any other place people might store a condom. There was nothing. Nor were there any condoms in the bathroom. The few medicines in the cabinet used to store them didn't hold any birth control pills either.She went to get her purse. She hadn't gone anywhere, and so hadn't needed to take it anywhere. She also hadn't dumped it to see what was in it. She did that now.No birth control pills.And only one tube of lipstick, in a clear color.So Claire wasn't advertising anything, but. I manhandled her breasts; her response was a soft sigh. Buttons popped off her blouse in my heated fondling, hopefully to be found by us rather than the housekeeper; I paused momentarily to reflect on my aggression."That's all right, Michael. I want you to keep going." You've never called me Michael before." You've never had your hands all over me before, and that's entirely your own fault."I had not ever been unfaithful to my Melissa, though I knew full well that she still sowed her wild oats,.