How do your children/teens friends address you? How to do you want to be addressed?
I grewup in a time where no child called an adult by their first name. It was always mr. or mrs. so and so, or if they were really close to the family Aunt and Uncle so and so. Sometimes, you had those "modern contemporaries" that inisted that the child call them miss first name.
I would honestly be addressed as mrs last name or at the very least mrs first name. But no one seems to instill that kind of respectfullness in their kids anymore.