No, my kids call me mom and yes I'd think it kinda rude if they first named me.
But
My step-kids call me by my first name, and my kids call my husband by his first name, and that is fine with both of us somehow.
When kids are small here, they usually call adults Mr. or Ms. First Name. Older kids to teachers Mr. or Ms. Last Name, but my kids friends who are older still called me Ms. First Name. Not much Sir and Ma'am anymore but I still hear it sometimes.
Aqui en Español, es la piña, no es la anana.