I squeezed his manhood, hard but not too hard, and continued, my voice never rising above a whisper. “It’s hot in there, hot and wet and begging for a man to thrust in and penetrate it. It wants to be full of hard man-meat, stretched. Your penis could fill my aching, gaping chasm. I would clamp down on you so hard when I came, pulsing on your rod. Fuck me. Yeah, fuck me. Are you ready to come? Are you ready to fill your sister’s vagina with your sweet, slick seed? Then do it. Jizz for me. Spurt!” And he did. Wow, he did. It blasted across the room, thick white ropes of cum, flying through the air for a good six feet. He jerked, his body contorting, and a long, loud groan escaped his lips, as his jizz landed on the wall, the carpet, and the last of it rolled down my knuckles. I pulled away, and he collapsed to his hands and knees. As he gasped, I collected my clothing, wiping the semen off on my panties. I clipped my skirt back on, and did up my shirt. By the time I was done, he was standing up. “I’ve never orgasmed like that before,” he said, awe in his voice. “Well, maybe you will again, we’ll have to see. It all depends how well-behaved you are.” Hope lit up his boyish face. “What do I have to do?” “Oh, all sorts of things. For a start, get this place cleaned up. Then tomorrow…” I grabbed his dick again, and wiped the end with my wadded underwear. Then I unravelled it and held it in front of his face. There were several slightly yellowed damp patches on the white material now, and a couple of remaining gobbets of goo. “You are going to wear these. All day.”
