Silence greeted her words.

"Jay, you're jacking off!" she said. "I know you're playing with your cock, and I know you played with it earlier, looking at me."

"Mom, what are you talking about?" Jay asked, his voice quivering with part fear, part excitement. "I'm not doing anything like that!"

"Bullshit!" Shellie snorted, jumping to her knees and then to her feet.

She looked over the edge of her son's bunk, but Jay had pulled the sheets to his neck when he heard his mother. At the side of his bunk was a small window, and the full moon seemed to cast a silvery light right across his crotch. His cock stood up, tenting the sheet.

With a quick dart of her hand, Shellie pulled the sheet from her son's body and saw his cock sticking through the fly of his shorts. She gasped as she stared at it.

Jay grabbed for the sheet with a surprised gasp, but his mother tore it from his hands.

"Look at you," she said, her voice husky. "Lying up here above me, jacking that cock off! And me… and me…"

Her hand shot out and closed about her son's cock. Jay gasped as his mother squeezed his cock hard. He lay stiff and unmoving, not certain what he was supposed to do. What his mother said was true, but he didn't know how she knew. He wasn't afraid; he was just startled by the sudden grab his mother had made on his cock.

Shellie felt the heat of her son's cock searing her fist, felt the throbbing of it. She held his cock as tight as she could, making moaning sounds, staring at his bulging cockhead in the shaft of moonlight.

"Oh, God!" she whimpered with excitement.

Her fist moved, slowly upward. Then downward, still slowly. Up… down.

"Mom, do you know what you're doing?" Jay gasped.