A petty one for a Monday morning, I know not bored at work at all, oh no, not me
DD has a long name, and we also chose a common shortened version to use regularly. For example, let's say she's Catherine, and we chose that name knowing we wanted to call her Katie, she would just have a full version on her birth certificate. However, as she's getting older I find that I'm starting to quite regularly call her Cat. It just comes without thinking, really, and isn't deliberate. But DP hates that shortened version.
This is only playing on my mind a little bit today because we were at a party yesterday and someone who didn't know us said to DP, "so you're daughter is called Cat?" and he said "no, she's called Katie" (with minor death glares in my direction). It made me realise that he really doesn't like the nn Cat.
AIBU to call her a nn I want to, or is it a bit rude to call her something her dad doesn't like?