Idea 3/4 Hocus Pocus x HP

(Coven/family/Soulmate au) Fem!Harry Iris platonic/soulmate au Iris is a descendent or young mate of the Sanderson sister's or descendent of Binx/Billy if mate au who gets summoned with the sisters because of blood/bond affecting her who gets summoned on Halloween because duh from England/Hogwarts (cant go beyond second year w/impatient Tom so events end week of or before Halloween and Iris thought she was done for the year) the sisters recognize her as family/mate through this magic and claim her Iris is shocked but happy then freaks out/has a panic attack after finding out they only have that day to live unless they get kids souls or finds another way. Her not wanting to go back to the Dursleys Iris helps by either getting kids or trying to find a different way while they go after Max and co at the last minute or so she gets the potion or she finds a way but it ties her life with theirs cue overprotective Sanderson sisters/or mainly the mate not just cause of their life being tied with hers but cause they also saw her life w/abuse and depending on if she was at Hogwarts her adventures and the manipulations if going that route so they teach her their way of magic or old spells to help protect her if they cant go with her to Hogwarts for soulmate/coven laws