what my son calls me

I am a birthmom recently reunited with my 2 birthkids. My son jumped in with both feet but my daughter is taking her time which is probably a good thing. My son asked me what I would like him to call me and I said whatever he fealt comfortable with. I was just so grateful to have him in my life it didnt matter what he called me as long as he called me!!!!. Anyway he has decided on Ma, he calls amom Mom and me Ma. Which suits everyone involved. I t doesnt matter what they call you as long as they call.