the_debt_of_time

Sirius removed it in one swoop. Mia slowly opened her eyes, blinking to adjust her
vision to the bright light, and stared ahead at the building in front of her. "Oh, Merlin,"
she heard herself mutter just as her jaw fell open.
The all-too-familiar building lacked the bright colours and flashing lights. It did not
have revolving, popping, and bouncing merchandise in the windows, nor was there a giant
ginger wizard wearing a top hat perched over the entrance of the building; but, sure enough,
there it stood: Ninety-Three, Diagon Alley—the future home to Weasleys' Wizard
Wheezes.
"I don't understand," Mia whispered, her mouth still open like a goldfish.
"This is our home! Well, not the whole building, obviously." Sirius gestured to the
run-down shop that had a Closed for Relocation sign on the front window. "It used to be
Madam Primpernelle's Beautifying Potions Shop, but she's upgrading and needed to move
somewhere bigger down the street. I bought the whole building from her, and there's a flat
just above the shop."
"What are you going to do with a shop?" Mia asked as she was led in through the
door where she saw a massive empty space that would one day be filled with shelves full
of Skiving Snackboxes, Patented Daydream Charms, and Pygmy Puffs.
"I have no idea," Sirius answered with a grin.
"When we were out looking for a flat, we came to Diagon Alley for lunch, and he
spotted the 'For Sale' sign in the window," Remus elaborated as they walked further toward
the back of the shop where a small staircase ascended to a door that Mia was vaguely
familiar with. "I'd barely finished my butterbeer at the Leaky before he was signing the
lease and handing over his Gringotts vault information to Madam Primpernelle."
She had only been to Fred and George's flat once—and that had been shortly before
going on the run with Harry, Ron, and Sirius—but Mia walked up the stairs to the flat as
though she were already home, smiling at the piece of the future that had been opened to
her in the past.
She wondered how on earth Fred and George had not known about the fact that
their shop had been previously owned by two Marauders.
There was no way they could have known. If they did, the whole world would have heard about it.
The twins might very well have shut down their shop and turned the whole place into a proper shrine.