Nalanxian
Ok, so the fake mom wanted her mom to move... The boy next door is gonna be a super elite she saved, either disease or wounds from assassination or somesuch Her "normal" family is gonna actually be a low key super family <hence why the "real Lu" daughter is so "ladylike"> that the "real Lu" daughter was too stupid to see thru... I bet the dumb fake mom has or will try to cut all ties with them...