"Gonna cum!" Phil gasped. "Oh shit, you suck so hard! Jack off my prick, Katy! Stroke it while you suck!"

Katy took his cock out of her mouth long enough to lick the whole, throbbing prick shaft, anointing the steely column so that her fist would be able to move on it without friction. She whimpered with animal pleasure as she stuffed the swollen cock knob back between her lips.

Then she started to jack his prick while she sucked it, pumping her fist up and down the thick meaty cock shaft. His cock was so fat that she could hardly curl her fingers around it. But Katy beat her brother's meat hard and fast, sucking madly, anticipating the gusher of cum about to be released from his hairy balls.

"Cumming, Katy!" Phil moaned. "Oh shit, I can't hold it back! I'm cuuummmiiinnnggg!"

His prick swelled to huge dimensions, trembling and jerking convulsively between her lips. Hot pre-cum oozed from the piss hole, more profusely than before. Katy's cheeks flushed as she sucked his cock as hard as she could, realizing that she was about to get the cum she craved.

A thick stream of cum opened his piss slit, shooting across her tongue. Katy tasted his cock nectar and hornily started swallowing. It was delicious, salty and thick and as milk-white as cream. She jacked his cock frantically, desperate for more cum.

Then a torrent of jism rushed out of his burning prick, draining his balls in spurt after spurt of cum. Katy gurgled in wanton heat and gulped it all down, working her throat muscles, determined to swallow all of her brother's jizz.

There was so much jism that the horny girl had to keep on swallowing for nearly a minute. But finally the cum stopped shooting from the tip of his cock. Katy took her brother's throbbing prick out of her mouth and lapped at it lovingly, cleaning the traces of his cum from the bloated length of his big fucker.