QUICK SHAKE

Grady pushed open the locker room door, still damp from the lake, and froze. His mom was buck-ass naked, her back to him, one foot lifted as she stepped out of her sopping swimsuit. 

The full, heavy shelf of her ass was on display, pale where her bikini had been, the tan lines stark against her skin. He could see the giant swell of her side-boob, the weight of it resting against her ribcage.

“Holy shit, Mom—what are you doing naked in here?” he choked out, his eyes glued to her bare flesh.

She didn’t even flinch. “It’s a co-ed locker room, sweetie. I know my tits and ass are out—but try to deal with it like an adult, ok?”

Grady’s fist had worked his skinny teenage cock raw more times than he could count, his brain always circling back to the same filthy fantasy: his mom’s thick, jiggling ass slamming back against his hips while he pounded her from behind. 

Now, here it was—his wet dream made flesh, that perfect, round ass bare and begging for his hands.

Grady grinned over at her, eyes glittering, mischief written all over his face. “Will you, um... shake your ass for me?” 

She snorted, rolling her eyes even as her lips quirked at the edges. “Grady, that’s not exactly dealing it like an adult,” she teased, voice honey-smooth but edged with amusement.

“One good ass-shake, mom, and I won’t ask again.” he promised.

“One quick shake,” she agreed, “then we get dressed. Your father’s waiting in the car.”

Without another word, she gave him a quick, sassy shake of her ass: two perfect globes rippling and jiggling just for his greedy eyes, soft flesh quivering with every playful wiggle.