"No," Donna said quickly as he released her arms. She shoved her hands to his waist, holding him on top of her.
"I'm sorry, Mom," he groaned, embarrassed.
"Don't say that!" she hissed, and wiggled her hips beneath him.
She moved her arms about his waist, caressing along his bare back. They kept looking into each other's eyes, neither of them knowing what to say now. Donna felt his cock hardening again, and Mike shifted his eyes away, a flush on his face. Donna moved her hands down his back and paused at the waist of his cut-offs, then slipped them lower. She cupped his ass through the shorts, and made a subtle, but suggestive, movement with her hips. She felt his cock throbbing against her closed thighs.
When he looked down at her again, his eyes were glassy with desire.
Donna's mind spun with perverse excitement. She pressed her hips up at his throbbing cock, then slipped her hand between their bodies. She brushed the back of her hand across the smooth head of her son's cock as her fingers tugged at the tight crotch of her shorts. She felt the wetness of his come-juice there, and managed to pull her shorts just far enough away from her cunt.
Mike, without saying anything, but still gazing down into his mother's eyes, lifted his hips slightly. Donna felt the head of her son's cock rub lightly across the lips of her now-exposed cunt. A gasp bubbled from her throat, and she shifted her hips. The head of her son's cock pushed at the entrance of her cunt.
Both were holding their breath now, staring with glazed eyes at each other. Donna still held her son's ass in one hand, her fingers of the other holding the crotch of her shorts to one side. Mike slowly, very slowly, pushed his cock inward. Donna lifted her hips just as slowly, and Mike's cock penetrated the fiery lips of her cunt.
Again Donna gasped, her eyes slitting but still staring up into his. She pulled down on his ass and lifted her own at the same time. She felt his cock move deeper, felt the hot throbbing of it. Mike pushed, and his cock slipped into her cunt.