"Don't, Beth, please," Brian said, his voice shaking. "I just want to touch it." Beth said, unzipping his jeans and placing her fingers next to his shorts. She could feel his cook begin to grow hard as she lovingly ran her finger up the shaft of his cock, through the fine material of his under shorts. She pulled his shorts down, revealing a massive cock almost bursting with excitement.

Brian tried once again to stop his sister, but his body was frozen, feeling the surges of pleasure race through his body as his little sister began to slowly jack his cock up and down.

"Oh, this feels nice!" Beth whispered. "It's so big and hard!"

She squeezed his cock and pulled her palm upwards, forcing the center of his pleasure upward to his swollen cockhead. He jutted his hips inward as she pursed her hand around his prick, gently massaging it with her fingers.

"Oh, Beth, that feels nice," he said, his feelings of right and wrong becoming blurred with, the pleasure his sister was giving him.

"Can I suck you?" Beth asked, kneeling between his strong thighs. "Can I put your cock in my mouth and suck out your cum?"

"Yes, baby, suck it!" Brian rasped. "Suck it dry!"

Just as Beth lowered her head to his cock, his cock just a couple of inches from her aching lips, they both jumped back from each other hearing the familiar voice of their father.

"I'm home!" he called out. "Beth? Brian, you here?"

"Goddammit!" Brian muttered, zipping his jeans up and pulling his sister to her feet. "Quick, get those sheets off the bed!"

"Be right down!" Brian called out.

He took the stairs two at a time and greeted his father. He tried to look him in the face, but he was too embarrassed.

"How was the game?" he finally managed to at last.

His father sat down and threw his golf hat on the couch. "Shot a 79. Not my day. How was yours?" he added.