Both of my kids have started calling me this. It's not Mum! anymore it's Muuuuuuu-uuuuum, turning into a six syllable or more word.
I love my kids and I love being their Mum but this new habit is sending my stress levels through the roof whenever I hear it, which is around 500 times a day!
Ds just did it again as I wrote this and had to clamp my teeth together to prevent myself from roaring "WHAT!!!!!!!!!" in manner of the bellowing of a charging silver back gorilla!
AIBU?!