This happens on medical notes too and letters from professionals. Maybe I am being over-sensitive, but I do find that being referred to as 'Mum' feels quite belittling and somehow lessens my contribution. 'Mum says that DS1 is walking better'; 'Mum says things are going better at home', etc.
The professionals get named - 'Jane Bloggs, SALT feels that DS is blah blah...'
I've got a name too! Use it!