Nathan grunted through his final reps on the row machine, sweat glistening on his massive chest as his mother's voice echoed down the stairs. At eighteen, the shy giant avoided the spotlight, but his body betrayed him constantly—especially around her. "Hiiii, honey! It's me!" she called, her chirpy tone laced with that familiar playful edge. "How's your workout? Is my big, muscular son getting even bigger?" He stammered a reply, eyes darting away, but her tight spandex shorts and sports bra left little to imagination. Her curves—voluptuous breasts that defied containment, hips flaring into an enormous ass—ignited his raging hormones. "Mom, I thought you already exercised today," he managed, voice strained. She laughed, witty and sharp. "Missed my cardio, sweetie. Besides, watching you lift those weights is better than any show. Don't mind me; I'll just run while you flex." Her treadmill started, and Nathan's cock hardened instantly, throbbing against his shorts. He couldn't look away, the sight of her bouncing bosom and jiggling ass making him unbearably horny. Unable to hold back, he yanked down his shorts, freeing his massive, dripping cock. Pre-cum leaked as he stroked it, panting. "Nathan!" she exclaimed, stopping the treadmill, hands on hips, strong and unyielding. "Caught red-handed? Or should I say, red-cocked?" Her eyes sparkled with amusement, not judgment. "You think I haven't noticed those tents in your pants for years? My son's always horny, huh?" Dialogue sparked between them, her voice teasing: "Big muscles, bigger problem. Tell me, does that cock get hard just for me?" He admitted it, voice husky, as she approached, her body radiating heat. She knelt, strong hands gripping his thighs. "Let's fix this properly." Her mouth enveloped his cock in a wet blowjob, tongue swirling expertly while she maintained eye contact, assertive and in control. Nathan groaned, thrusting gently as she took him deep, saliva dripping down his shaft. She stood, shedding her bra, massive breasts spilling free, then peeled off her shorts to reveal her dripping pussy. "Fuck me against the weights," she commanded wittily. "Show me that strength isn't just for show." He lifted her effortlessly, impaling her on his hard cock. She rode him with powerful hips, ass slapping against his thighs, both sweating and panting in rhythm. "Harder, Nathan—make me come!" Her pussy clenched wetly around him as she climaxed first, then he came, flooding her with cum. They collapsed, bodies intertwined. She smirked, "This is just the warm-up, son. Next time, we go further."
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