I said, get him to show you his cock.

As your girlfriend bit your shoulder, you growled, "I said, get him to show you his cock. Look at him. Now."

Your girlfriend whimpered and sighed almost silently, "Yes, sir." She moved her head from your shoulder and you felt the impressions from her teeth. She had one hand covering her pussy and other hand covering her nipple, but the other one was out in the open, looking like her swimsuit had just shifted off it while she slept. She looked and bit her lip.

"Tell me what you see," you said, knowing full well what she saw because you were seeing it too. This guy was rock hard across the beach, the view only interrupted by the occasional person walking between you and him. His cock was iron and he was rubbing it through his suit. Impressive. Probably bigger than yours and you had a definite need to watch him fuck your girlfriend, the thought of the two of them screwing like animals in a hotel room made your dick even harder.

"He's...mmmm..." she said and you looked at her to see her fingers pushing against her pussy. "He's hard...."

"For you," you interrupted.

"Fuuuuck...he's hard for me," she whimpered.

"Get him to take his dick out," you growled.

"Show it to me," she said slowly, exaggerating her mouth movements. She wasn't looking at you. "Show me your cock," she added. She was whispering, he can't hear her across the beach, but you can.

"Oh fuck..." she groans and you hear her fingers push between her pussy lips; the wetness squishing around them. You watch her digits sink in between her labia and they completely swallow her fingers as her hand slides lower and her finger tips slide just inside. "Oh fuck he's..." she groans and bites her lip. You turn and look toward him and he's...