Heather had just recently learned how to masturbate, but it couldn't compare to the feeling of her brother's thick middle finger streaking in and out of her inflamed pussy. She'd never felt anything so fucking good in her life and the girl's entire body was responding to it.

"Oh, Tommy!" she squealed, arching her hips up off the cushion. "Don't stop, honey! Don't stop! I'm gonna do it gonna do it!"

She collapsed, completely exhausted.

"Oh, Tommy," she panted when she once more caught her breath. "That was so wonderful."

"You really went wild," he grinned, relieved to see that his sister was all right.

"I know," whispered Heather. "I always finger myself off. Now can I see your pecker?"

"Sure," he grinned standing up and removing his clothes.

Heather's eyes almost bugged out of her head when she tint glimpsed his huge naked cock thrusting up from between his legs. The girl had assumed that pricks were about the size of a finger, and she was completely stunned when she saw Tom's cock. Staring at his huge tool, she couldn't conceive of how it could possibly fit into a girl's cunt.

"My God," she gasped in a breathless whisper. "It's so big."

As the boy stood beside the sofa, Heather reached out and wrapped her fingers around the hard fleshy pole. She couldn't get over the hotness of it as well as the spongy texture of his rock-hard shaft. Pussy juices began flowing out of her twat as she felt the blood pulsing through the veins, making his cock throb in her hand.

"Jeez," she whispered. "How can a big thing like that fit in a pussy?"

"Let's find out," he panted.

"Shit," she gasped. "That would kill me."

"Please," whispered Tom, reaching down and stuffing his finger up into her hot hole again.

"Oh, boy," she mewled as his finger slithered back and forth over her hard clit. "That feels so good."

"Please let me put my cock in," he writhed her slit around his plunging finger.