Disclaimer: As usual I own nothing.
HALF BLOOD FILTH, DESECRATING THE HOUSE OF MY ANCESTERS...
Harry had been forced to listen to the old hag screaming similar things every time he went to Grimmauld Place since his fifth year. It had been two years since he had defeated Voldemort and he had been busy; Grimmauld Place was almost ready for sale but he had just one problem, the portrait of a certain old hag was still hanging in the entrance and so far had resisted all attempts at removal. While he could technically leave it up the second anyone heard her foul shrieks that would be the end of the deal, not to mention the fact he was planning to sell the house to Muggles as part of Sirius's ultimate revenge, a screaming portrait might raise a few eyebrows among Muggles. He had no choice it was time for him to use his ultimate weapon, as Harry cackled insanely in the sitting room of Potter Manor a rather annoying portrait in London paused her screaming for a second as she felt a twinge of fear, something was changing and she was sure she was not going to enjoy it.
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Harry entered the front door of Grimmauld pausing for a second to admire the changes he had done to the old house, his attention was immediately brought to the center of the room by Mrs. Black working herself into another rant, deciding to cut her off before she worked herself up to much Harry cheerfully said, "Hello Mrs. Black I have some good news for you."
Confused by his attitude Mrs. Black suddenly became quiet.
"As you know your Great Grand Nephew tragically lost his parents three years ago, now lately he has been acting out a bit more then usual. After consulting a child psychologist it was suggested that perhaps Teddy needed to interact with more of his blood family members Andromeda does a lot but her St. Mungos mind healer has sadly advised her to stay away from Teddy for a while, something about driving her to an early grave, now since you are always speaking of your concern for your family every time I visit I thought you might like to take a more active role in the life of your Great Grand Nephews life."
Mrs. Black sneered, this son of a Mudblood was either an idiot, extremely arrogant or both. "You actually expect me to spend time with that Half-Breed whelp; even if I wanted to I could not do anything with the freak remember I'm a portrait."
Harry's smile became feral, "while you would normally be correct I was thinking you could spend time with him while he practices his art skills he's a most accomplished finger painter, just ask my wife she has to clean the walls of his room daily.
As Mrs. Black became more and more horrified at the implications of what Harry had just said, a little boy entered the room holding several large bottles of paint, "Hiya Aunty Wally we're going to have so much fun I think I'll start by changing your hair color, since your a girl what do you think of pink."
"POTTER!"