"Fine, okay." Brad stood up and pulled his shorts and boxers down and out of the way before retaking his seat. "Please continue," he said with a magnanimous sweeping hand gesture.
Angela knelt again and, after assuring her hair was out of the way, began her chore.
Brad got his dick sucked by his little sister every morning when he visited home. It was a family tradition and they'd had this arrangement ever since she turned eighteen, but it never got old. Partly because one never fully tires of having their dick sucked, but also because Angela was truly an artisan of her craft. Whatever their mom had done to prepare her for her family duties, she deserved a medal.
Before Angela, their mom had served this purpose. Now everyday, Angela made the rounds. Anyone who hadn't been laid that day was welcome to her services. To simplify the issue they had made a schedule: Brad in the morning, Mom at midday, and Dad in the afternoon.
Usually in their family, one's responsibility to siblings or offspring ended after that sibling or offspring got romantic partners of their own. But as Brad watched Angela drag her tongue up the underside of his cock, and then felt his cockhead touch the back of her throat, he thought maybe he would never date again.
"Jesus Christ Angela," Brad gasped. With one hand he shoved his sister's face into his crotch, forcing his dickhead to the back of her throat right before cumming ropes. She gagged violently, but didn't try to pull away.
When finally Brad released her, she quickly licked the end of his cock and then wiped her mouth. "Cool. With my sisterly responsibilities done, I think it's time to dig out my swim suit."
"Angela, honey," said a voice from the door.
Angela and Brad both turned.
Their mother stood in the doorway. She had stripped down to her underwear, lacy black panties and a low cut bra. As she stood there, she began pulling down the lower garment. "Sorry dear, but it's just about noon. If you could take a couple minutes before you go..."
Angela groaned. "Jesus Mom, but you take forever!"