He teases her and she responds

Cathy swirled her tongue over the tip of Frank's cock, making him growl with rising excitement. The girl had some talent to get him hard so quickly after all the meat he'd thrown to Brittany that morning, and he grinned down at her as she worked his shaft.

"I can taste another woman..." she murmured, "Some other slut's pussy...mmmm....I'm not your first today...."

"Are you here to ask questions or suck cock?" he growled. "All you're doing is teasing it. By now your little sister had it halfway down her throat and was sucking the cream out of it."

Cathy's eyes flashed at him, then her mouth descended on his cock, her hand stroking as she took him deep, sucking him like a vacuum gone berserk.

He gave a grunt of surprised pleasure, resting his hand on the back of her bobbing head. She pushed herself deep, her jaws working as she engulfed him, taking him into her throat. She held him there, both of them quivering, before pulling off him with a gasp and looking into his face with sultry eyes, a strand of drool trailing from her pretty lips.

"Do...do something to me...something you didn't do to...to Cadey...do it hard..."