The house was quiet as 18-year-old Tim crept up the stairs, his footsteps muffled by the plush carpet. It had been three long weeks since his father had left on another business trip, leaving Tim and his mother, Cindy, alone together in the sprawling suburban home. As much as Tim loved his dad, he had to admit that these past few weeks had been some of the best of his life.

Cindy had always been a bit of a free spirit, but with his father gone, she seemed to have thrown caution to the wind entirely. She was constantly lounging around the house in her skimpiest outfits, her curvy body on full display. And lately, Tim had started to catch her in compromising positions - bent over the kitchen counter one morning, her skirt hiked up as she frigged herself furiously; splayed out on the couch another night, two fingers buried knuckle-deep in her dripping cunt as she watched some softcore porn on the TV.

The sight of his sexy mother getting off had awakened something primal in Tim, an overwhelming urge to take her, to claim her as his own. He had spent every night since then jerking his thick 8-inch cock to thoughts of Cindy, imagining all the filthy things he wanted to do to her ripe body.

Now, as he approached her bedroom door, he could hear the telltale sounds of her masturbating - the creak of the bedsprings, the wet slaps of flesh on flesh, her breathy little moans punctuated by the occasional whimper. Tim’s heart raced as he turned the knob and pushed the door open.

Cindy was sprawled out on the bed, completely naked, her creamy thighs spread wide. One hand was buried between her legs, four fingers pumping in and out of her pink, glistening pussy. The other hand was tangled in her hair as she gnawed at the fingers, her back arched off the bed.

“Fuck, yes,” she gasped as she frigged herself faster, her heavy tits jiggling with each thrust of her hips. “Mmm, so fucking good...”

Tim stood in the doorway, his eyes roaming hungrily over his mother’s curves. Cindy’s body was the stuff of dreams - thick thighs that met in a shapely ass, a tight waist that flared out to wide, womanly hips, and a pair of the biggest, juiciest tits he had ever seen. They were capped with fat pink nipples that stood out like eraser tips against the pale, smooth skin.

Cindy’s eyes flew open and she froze when she saw Tim standing there, his dark eyes gleaming with lust. “Timmy?” she gasped. “What are you doing here?”

Tim didn’t answer. Instead, he crossed the room in three long strides and climbed onto the bed, crawling between Cindy’s legs. She made a token protest, trying to push him away, but it was halfhearted at best.