Gabby time travels back to steal Harry for herself. Fleur travels further back and steals him back from Gabby. Ends with Katie literally cradle snatching him and running off to one up Fleur. At that point Fleur might just kill Katie and raise Harry herself and just take him back to the future but this time there’s no present Katie since Fleur has murdered her in the past. Fleur and Harry get to raise their kid which just so happens to be a baby Harry. Through more time travel hijinks baby Harry and Gabby get together through a bizarre de-ageing accident.