My childs father has two children with other women. I'm not with him and I don't know if I should talk to the other mother's or not he has no interest in ever seeing her. I don't want to make things more complicated for the other Mom's or for my daughter. Her biological father is also a sore point for my husband he'd prefer her think he's her real dad since her bio dad is not a good person. Does she have to know that she has siblings? She's only 4yrs old can it wait?