the_debt_of_time

"So did I," Mia said, casually taking a sip from Sirius's firewhisky. "Granted, it took
me a longer time to achieve it the first time I came up with it, but I've simplified the potion
over the years, casting the Colovaria over the entire brew instead of the individual pieces.
All that was left was my secret ingredient," she said, purposely not looking in Tonks's
direction.
"Your hair's turning green, Fred!" George said, looking at his brother.
"So's yours, George!"
Mia smiled satisfactorily. "I do love green. On you boys, it looks positively envious.
I've always thought it made me look rather brilliant."
"Much better than red," Draco chimed in, ignoring Ron, who was glaring at him.
"What's the secret?" George demanded to know.
Mia shrugged her shoulder and stared down at her hands, seemingly to examine her
nails. "What do I get for it?"
Fred grinned brightly. "You hear that, brother mine?"
"I think she wants to bargain with us."
She looked up at them, folding her arms down in front of her. "I own the entire
patent and collect fifty percent of the profits from all sales of Mood Juice," she said, smiling
at the name that the boys had given it decades earlier. "Then you can have my recipe."
"Mood Juice?" Fred asked, interested.
"It changes according to us?" George inquired.
Mia smiled in confirmation.
"She used to slip it in the pumpkin juice at breakfast," Remus said with a quiet
chuckle. "The whole school would be affected by it for at least an hour. Slytherins were
furious."
"Go have a wank and see what happens," Sirius suggested.
"Sirius Black!" Molly snarled at him from across the room.
It was too late, however. Fred and George grinned at one another and rushed out
of the tent as fast as their long legs could carry them, one going left as they exited, the other
going right.
Ginny made a disgusted face. "Well, at least they went in separate directions."