Judy stood above her brother's head, staring with an expression Karen knew well – desire, hot, boiling, crazy desire… mindless, hungry desire.

Robbie looked up at Judy, and found he was looking up her dress, past her knee socks, at the satiny flesh of her slender thighs and the tight crotch of her pink panties, the ones with little white hearts on them. His cock throbbed powerfully, and his balls ached as he clutched them, his legs wide apart.

"Oh, Robbie!" Judy whimpered softly, taking another step, her foot at the side of his face, her legs parted a little. "Ohooooooh, Robbie!"

Robbie gazed up at the crotch, of his sister's panties, no longer frozen with shock. He grinned, sliding his hand off his balls and closing his fist around his cock. The band of Judy's panties poked out slightly with the lips of her young cunt, and he licked his lips.

From around the corner, Karen was staring, surprised to see that her young, innocent daughter was fascinated by Robbie's hard-on. It was hard to believe Judy had sexual feelings, she was so very young. But she did – very much so, as Karen was seeing now.

Judy stood above her brother's head, her feet around his face, trembling as she gazed at his cock. Her little ass bunched, the movement obvious to her brother's staring eyes. He could see the creamy flesh on one little ass cheek where her panties had slipped a little into the crack.

Karen, now fascinated and not embarrassed, watched them closely.

Judy walked down her brother's body straddle-legged, and turned when she was above his knees. She stood facing him, her eyes still burning on his cock. Then she bent her knees, squatting over his thighs, breathing deeply as one small hand moved cautiously toward her brother's cock. Robbie removed his hand, and lifting his ass slightly, touched his cock to the tips of his sister's fingers.

"Oooooh, Robbie!" Judy cooed, her eyes moist and filled with steamy desire.