Hank could only moan as his massive cock leapt in her fist, leaking fresh jism onto her fingers. Marie squeezed his cock hard, massaging and tugging the steely stiffness of the root. She'd never even given a bay a hand job before, but she remembered all the techniques she'd learned from reading the dirty pages of cheap paperback books.

"Does it feel good when I stroke it, big brother?" Slowly, teasingly, she milked her fist up and down the swollen cock shaft, pausing at the tip to pinch the flaring head. "I'm giving you a hand job, aren't I? Just like when you jack off your big, hard prick!"

"Unnggghh!" Forgetting everything, Hank held her shoulders and started to rock his ass, fucking his prick through the tight oval of her fingers. "Oh fuck, Sis! I can't believe… unh! Can't believe you're fucking doing this to me!"

"Oh, I want to suck it now," Marie purred. Dropping her head, the horny teenager pressed her tongue to the puffy crown of his hard-on. Hank moaned as she licked the drooling jism from his piss hole, swiping her tongue all around the bloated cockhead.

Holding his cock tightly, Marie licked up and down the entire length of her big brother's throbbing prick shaft. Finally she opened her mouth wide and stuffed the fat prickhead between her ripe lips.

"Oh, fuck!" Hank dug his fingernails into her shoulders, watching as his baby sister eagerly started giving him head. "Unh, that's right, fucking suck on it, Marie! Oh fuck, gimme a blow job! Suck the cum out of my cock!"

The musky aroma of prick meat filled her nostrils, making her pussy ache between her thighs. Slurping contentedly, Marie pursed her lips in a tight circle around the veined thickness of his cock. Then she caved in her cheeks and hungrily started to suck her brother's prick, treating his cock like the world's most delicious lollipop.

Her enthusiasm made her a natural cocksucker, as if she'd been giving blow jobs her whole life. Remembering a steamy passage from one sordid novel, Marie remembered to fold her lips over her teeth, so they wouldn't nip the sensitive cock shaft. Slurping and sucking feverishly, she rolled her tongue lazily around the heart-shaped prick crown, darting it repeatedly onto his cum slit.