Before I begin, I will just say I have a lot of respect for Cm, very positive relationship and feel very confident that she is the 'right' person to look after DS. BUUUUT, I have heard two of the other children call her 'mum', one 2yo and one 3yo. This makes me slightly uncomfortable and rings alarm bells for reasons I can't even put into words. Any cms out there? Is it normal practice? It's just that by 3 I would expect a child to know the difference between CM and mum and for the cm to gently correct any misunderstandings. I really do think the world of CM, AIBU to think it's a bit weird? The kids also refer to other family members as 'grandma' etc, which seems more acceptable to me. Probably stressing over nothing.