what does baby call you?

I tell them when they arrive that while they're here, I am a substitute mother, like a substitute teacher and I do the mom stuff while their parent (or foster parent) is unable to. I can't be their mom and I'm not the same but kids needs someone to do the mom job unitil theirs can do it again. I tell them they can call me by my full first name, call me "Kay" or use any polite term (I.e. Aunt or Mom). Almost all of the littles (under 5) use mom or "Mama K". The older kids who have been in care a long time, also tend to refer to me that way. I think that some of them have had so many moms that mom truly means the role to them and not a specific person. Older kids just pulled into care and teens usually opt for my first name. Though we had one for a week who called me Mrs. Last Name the whole time.