Robin was suddenly anxious to taste his jizz, but she realized from masturbating him that Mark enjoyed having her tease and prolong his ejaculations. He liked her to bring him to the very brink of a climax, then let him slide back and then bring him up again.

Suddenly feeling his muscles tense, she quickly released his ready-to-explode cock from her slurping lips.

"Does it feel good?" she whispered up to him.

"Fuck, yes!" he gasped.

"Your prick sure tastes good," she grinned. "Am I a good cock-sucker?"

"You sure are!"

"Good," she giggled, thinking what a neat guy this big handsome boy was. "Because from now on I'm gonna spend a lot of time giving you blow-jobs."

"I'm all for that."

Tenderly sliding the skin up and down over his rigid shaft, Robin again covered his big bloated knob with her hot, open mouth. Then she began a slow, gentle sucking action that almost blew Mark's mind. With every deep and powerful suck, it felt like she was drawing his asshole up through his quivering boner.

"Oh God, Robin!" he moaned, his trembling fingers clutching at the girl's hair as her slippery warm mouth moved up and down over his blood-engorged cock. "That feels so fuckin' good, baby, so fuckin' good!"

Her head was bobbing faster and faster as she sucked more violently on his straining prick. Mark's entire body was jerking and trembling from the wild sensations being induced by Robin's hot slavering lips. Faster and faster she worked over his throbbing tool as he instinctively arched his hips to meet every downward plunge of her sucking mouth.

Robin was half wild with the intense excitement. The smooth sinewy flesh of his hot naked cock was rubbing deliciously against her lips, tongue and throat. Having jacked Mark off so many times, she could tell from his wild writhing that he was rapidly approaching a climax. Eager to feel and taste his hot jizz, the girl began sucking with a wilder intensity.