She shoved him onto the bed and told him to strip. Jake, the skinny nerd with glasses and a perpetual flush on his cheeks, fumbled with his shirt and jeans like he always did when she got bossy. Mia stood over him in just her black bra and the new harness she had bought that afternoon. The thick silicone dildo already jutted out from between her legs, seven inches of smooth, veiny cock ready to wreck him.
“On your knees first,” she said, voice flat and dirty. “Suck it. Get it wet for your ass.”
Jake dropped fast. His own cock was already hard and leaking, bobbing between his thighs as he opened his mouth and took the fake dick between his lips. Mia grabbed the back of his head and pushed deeper, making him gag once before she eased off. Spit ran down the shaft. She fucked his face in short thrusts, watching his eyes water behind the glasses.
“Fuck, you look good like this,” she muttered. “Nerd boy choking on cock. You want the real thing in your ass, don’t you?”
He nodded around the dildo, drool spilling from the corner of his mouth. Mia pulled out and slapped his cheek with the wet head. “Turn around. Ass up.”
He scrambled onto all fours. Mia climbed behind him, spread his cheeks with both hands, and spat right on his hole. She rubbed the head of the strap-on through the spit, pressing just enough to make him push back.
“Beg for it,” she ordered.
“Please, Mia. Fuck my ass. Peg me hard.”
She pressed the tip in. Jake groaned as the head stretched him open. She didn’t rush. Inch by inch she sank the thick cock into his tight hole, one hand gripping his hip, the other reaching under to stroke his leaking dick in time with her slow push. When she bottomed out, balls of the harness pressed against him, she held still and let him feel it.
“Goddamn, you’re taking it so deep,” she growled. “Look at that nerd ass swallowing every inch.”
She started thrusting. Short, firm strokes at first, then longer ones that made the bed creak. Jake’s moans turned into broken gasps every time she bottomed out. His cock swung under him, dripping onto the sheets. Mia reached around and jerked him rough and fast while she pounded his ass.
“Tell me how it feels,” she demanded.
“Feels so fucking good. Don’t stop. Fuck me harder.”
Mia grinned and picked up the pace. The wet slap of her hips against his ass filled the room. She angled the dildo so it rubbed his prostate on every thrust, and Jake’s arms shook. Pre-cum poured from his cock in a steady stream. She kept talking the whole time, raw and filthy.
“Such a tight little hole.

You were made to get pegged. Gonna make you come with my cock in your ass, nerd.”
She pulled almost all the way out and slammed back in, over and over. Jake was babbling now, pushing back to meet every thrust. His glasses had slipped down his nose. Sweat ran down his back. Mia’s thighs burned but she didn’t slow down. She wanted him wrecked.
When his moans pitched higher she knew he was close. She let go of his cock and grabbed both hips, driving into him with short, brutal strokes that nailed his prostate every time. Jake’s whole body locked up. His untouched cock jerked and shot thick ropes across the sheets without a single touch. He came hard, ass clenching around the dildo, voice cracking on her name.
Mia didn’t pull out right away. She stayed buried deep, rocking gently while he shook through the aftershocks. Only when his breathing evened out did she ease the strap-on free. Jake collapsed onto his stomach, hole twitching and shiny with lube and spit.
She stripped the harness off, climbed over him, and kissed the back of his neck.
“Next time I’m making you ride it,” she whispered against his ear.
Jake just groaned and nodded, already half-hard again against the messy sheets.