@Hafa9141
What a pain! I would say no too, and message everyone to tell them.
Is your mum really young? Or does she just act it?
I can't imagine doing this to my adult DC.
I do know a few mums who try and live their lives through their DC though, and they are usually the ones who had their kids very young.
Someone I know got married in 2016 aged 22, and her mum was 39 (so had her at 17,) and you'd have thought it was HER getting married; she completely took over everything. Hen do, wedding guest list, choosing the flowers and venue, and she even invited herself onto the honeymoon ... cringe ...
Now the young woman I know has had a baby, (just gone one year old,) and her mother has virtually taken over raising the baby.
How the young mum and her DH stand it I don't know. I think they are both just VERY passive and timid.
If I were her (AND if I were you,) I would move house, leave town, and not pass on my forwarding address to my mother!