Had an odd thing happen at mum's birthday party last week. Clearly there had been an incident with dad of some sort but I couldn't find out exactly what at first because we don't talk about mum's behaviour or illness when she's there - a difficult feat given that she follows dad everywhere! Anyway, to try and show me what was happening dad asked mum "what's your name?" She said "Kitty". Kitty is not even close to my mum's name. He said "Are you sure, I thought your name was B?" and she said "No." I've never seen anything on here about people not knowing who they are - it's difficult to know if she still thinks this because she hasn't spoken again since. Has anyone come across this before? What shoudl we do? Call her by the name she thinks she is or still call her by her normal name?