What does he do now?

Do some more fantasy building.

Harry walks to his bed in his private bedroom. He suddenly has an epiphany on new rules to make.

Old Rule: Hogwarts begins taking in students when they are or will be turning 18 for the school year.

Harry then edits one of his previous rules to say first year instead of sixth year.

Old Rule: Harry Potter and any other ownerss of the Rulebook receive another copy of memories regarding the new reality created by the making of Old Rules.

Harry clutches his head as his new memories come rushing to him.

Old Rule: Any female born to Harry's sex slaves age to full maturity within one month, becoming new sex slaves as a result of their mothers enslavement.

Old Rule: Harry's sex slaves only become pregnant when Harry Potter desires them to become so, and they will receive sexual pleasure from the acts of being pregnant and giving birth. The sex of the child is determined by Harry Potter's choice upon conception.

New Rule: The existence of the Fidelius Charm is now under a Fidelius itself, with Harry as secret keeper. Harry Potter is now the only one capable of casting it, via the incantation Fidelio, and others, who have been let in on the secret, are left incapable of casting it.

Once done, Harry sets out to the **** quarters, to find his enslaved aunt.

He arrives to find her sprawled out on a bed, asleep.

'This won't do' Harry thought, beginning to write some rules regarding the slaves quarters.

Old Rule: The **** quarters on Harry Potter's private floor have an Expansion Charm, growing in interior size with each sex **** acquired by the amount required to maintain minimum living space for all inhabitants.

Old Rule: Harry Potter's sex slaves are required to sleep restrained, this is done via restraints that are conjured into existence by the slaves falling asleep and vanishing upon awakening. These are charmed to reinforce the slaves submissiveness by inducing the slaves to wet dream about serving their Master in any way he likes, causing them to become horny while obeying him, even in degradating and dehumanizing situations.

Harry then looks back at Petunia, to find her restrained in the bed, spread eagle to expose her pussy and stretch her breasts, and a ball gag in her mouth muffling her moans of pleasure. Harry then awakens her.