She stood there frozen on the hot sand, the towel slipping from her fingers as her eyes locked on the stranger walking out of the surf. His cock hung thick and heavy between his legs, easily twice the size of anything she'd ever seen, swinging with each step as water dripped down his thighs. It was her first real look at one that big, and the sight hit her like a punch low in her belly.
"Fuck," she whispered, not meaning to say it out loud. Her boyfriend turned, following her stare, and a slow grin spread across his face when he saw what had her attention.
"You like that?" he asked, voice low and rough. "Never seen a cock like that before, have you?"
She shook her head, cheeks burning, but she couldn't look away. The stranger noticed them watching and gave a lazy nod, his hand casually brushing over the massive shaft like he knew exactly what it did to people. Her pussy clenched hard, already wet inside her bikini bottoms. She pressed her thighs together, trying to hide it, but her boyfriend caught the movement.
"Get on your knees," he said, right there on the open beach. "Show me how much it turns you on."
She dropped without thinking, sand grinding into her knees as she yanked his trunks down. His cock sprang out, hard but nowhere near as thick as the one she'd just seen. She sucked him deep anyway, moaning around it while her eyes stayed glued to the stranger. He stood maybe twenty feet away now, openly stroking that huge dick, the head glistening in the sun.
Her boyfriend fucked her mouth harder, gripping her hair. "You want that big one, don't you? Want to feel it stretch your tight little cunt?"
She nodded, spit running down her chin, and reached between her legs to rub her clit through the thin fabric. The stranger came closer, close enough that she could see every vein, every drop of precum leaking from the slit. Her boyfriend pulled out and spun her around, bending her over the towel so her ass faced the water.
He ripped her bikini aside and shoved inside her in one thrust. She was soaked, dripping down her thighs, and she cried out as he pounded her. But her eyes stayed on the big cock in front of her. The stranger stepped right up, close enough to touch, and she reached out without asking, wrapping both hands around the thick shaft. It felt hot and heavy, too wide for her fingers to meet.
Her boyfriend groaned at the sight. "Stroke it while I fuck you. Show me how bad you want it."
She jerked the stranger's cock in time with her boyfriend's thrusts, the wet sounds loud over the waves. Her body shook, orgasm building fast from the sheer filth of it. The stranger pushed forward and she opened her mouth, taking the head between her lips. It barely fit, stretching her jaw, and she gagged but kept sucking, drooling all over it.
Her boyfriend slammed in deeper, fingers digging into her hips. "That's it. Take that big cock in your mouth while I fill your pussy."
She came hard, cunt pulsing around him, legs shaking. He didn't stop, fucking her through it until he pulled out and painted her ass with his load. The stranger wasn't far behind. He pulled free of her mouth and stroked once, twice, then shot thick ropes across her face and tits, the cum heavy and hot.
They left her there panting on the towel, used and marked, the taste of that huge cock still on her tongue. Her boyfriend leaned down and kissed her messy mouth, tasting it too.
"Next time," he said, "we're inviting him over."
