I've not known the family long (met through older kids) but every time we meet, this woman's just-turned 3yo calls me "Mummy" whilst putting his arms up to be held/cuddled by me
I've always laughed it off and been relaxed and jokey about it ("I'm not your Mummy Darling; she's over there") but I'm just wondering if it's normal/others have experienced it? He has speech delay, don't know if that's relevant.