Help please

So long story short i have two step children who ive raised from todler and infant mother basically abandoned them for four years moved outta state whole 9 now that she can no longer travels as she pleases due to child support she suddenly wants to go to court my man and i are not married i just want to know if there is anything i can do to help keep my little loves home my name is on all school paperwork doctors appointments day camps everything has been me im freaking out potty training learning to talk and walk please help