Head to Amber's Room

He didn't bother with his clothes. Amber's room was just across from his own, so worry was the last thing on his mind. Lust was at the forefront, and it made sure to make his balls grow heavy with seed.

Jaune stood right outside Amber's bedroom door, one hand holding the notebook, the other furiously masturbating his foot-long pecker. As per the rule, he has complete control over his ejaculation, and the longer he kept pumping to an unreachable release, the stronger the pleasure became, somehow offsetting the desire for it to ensuring this pleasure keeps building and building. He had yet to notice the state of his balls, which had grown from ping-pong balls to golf balls.

It took some mental will to **** his hand away from his cock so he could knock on Amber's door, but before he could put knuckle to wood, his ears perked at a muffled moan from the other side.

Jaune smiled.

Looks like "infatuation" might be an understatement.

Well, far be it from him, her brother, to just barge in without permission while in the middle of a very private moment.

He tried the knob. It turned, and the moment he stepped in, he could smell something faintly enticing before his face met with a thrown pair of shorts.

"Jaune!" Amber shouted. "For fuck's sake, don't you..." There was a pause. "Why are you still naked?!!"

He picked up the shorts and discarded them before closing the door behind him. Amber was on her bed, shortless and her pink panties hanging from one ankle. His dick twitched, and it was satisfying to see his sister's focusing on it, as if it were an enticing treat.

"Don't stop what you were doing, Amber," he said, the command in his voice coming out as easily as if it were breathing. "Let's get off together."

Normally, Amber would've done a lot of things: Give him the finger, shout at him to leave, grab something more solid to throw at his face, maybe even spit at him. But with his newfound "persuasion," it only took five seconds of silent hesitation and cock-staring for his sister to slowly spread her legs and resume her jilling.

Before he proceeded further, he had to add a few new entries to the notebook.

New Rule: Jaune Arc is an expert in sex and his sperm is incredibly fertile.

New Rule: Amber Arc is currently fertile and has no qualms in being impregnated by her brother. Due to her state, her erogenous zones are doubly sensitive.