It'll help her with her magic if or when she regains that too but yeeeeeeeeeeah this thing showing up will be. an Experience.

eta:
With their moms being sisters and all, it'd make sense to say that Kat's parents are also from Wales but came on over themselves at some point before they had her, reasons for the move kind of up in the air but those can probably be left until they actually need to be addressed, if they need to be addressed.