Sometimes DS will call me by my first name. It doesn't really bother me- only for the fact that I get weird looks, which than I have to explain and DS thinks he's getting attention for it so keeps on doing it.
My brother HATES it and pulls him up on it every time- which the more he pulls him up on it, the more DS does it.
I kinda figure- it's not like I call him "son" so there's not much difference in him calling me "Mum".
What do you think? Would you be ok with it?