a wrinkle in time

in which remus and sirius adopt a baby girl with memory loss,
or
in which she time travels to 1993 and meets harry potter

NO LOVE INTEREST
she is 4.

where remus lupin and sirius black adopt a 4 year old girl in 1981. one day, she accidentally gets ahold of a time turner, bringing her 12 years into the future. harry hermione and ron all have to take care of her, keeping her hidden from the dangers of sirius black. although, there's just one problem, how is she going to remember them?