"Please don't tell," Phil whispered hoarsely. "They'll kill me. Please…"

Katy dropped the magazine and stepped closer, staring openly at his swollen cockbulge. "You really don't want me to tell, Phil?"

"No, please!"

Katy pouted. "Well, then you gotta do something for me!"

"Don't blackmail me!" Phil said angrily. "Not like the time I came home drunk and you made me do your homework! You little bitch!"

Smiling shamelessly, Katy interrupted her big brother by falling to her knees before him. She slid her hands up his thighs and made his gasp as she cupped his stiff cock through his slacks.

"Phil, why is your cock so big and hard?" she asked huskily.

Phil gaped at her silently. Hungrily, Katy kneaded and squeezed his cock through his pants, feeling her pussy burn as she felt the hot stiffness of the cock column on her fingers.

"Those dirty, magazines really turned me on, big brother," she mewled. "I wanna see your cock!"

Phil just stood there and quivered as his baby sister unzipped his pants. Then she pulled them down to his ankles, leaving his nakedness concealed only by his shorts.

The cotton of his jockey shorts was stretched obscenely by his swollen cock, and she could clearly see the fat shaft and spongy, heart-shaped cockhead. Katy's pussy started creaming. Her fingers shook as she pulled off his underwear. Free from confinement, his big prick leaped out and throbbed and jerked in mid-air.

"Oh slit, Katy!"

"God, Phil! You've really got a boner!" Katy whimpered. "It's even bigger than the pictures in the magazines! Oh fuck, your cock really turns me on!"

Eagerly, the horny girl slid her hand up her brother's hairy, surprisingly muscular thigh. Her fingers dug into his ball bag, feeling the twin globes there, clotted with a heavy load of cum.