There's a huge back story to this but briefly I am very low contact with my DF due to a falling out with his partner. I've tried to make amends, they'd rather not. I havent spoken to him since the new year however he has sent birthday cards for myself and my sons, as I have for him. Tomorrow is DDs first birthday. Despite being invited he has never met her. He hasn't sent her a birthday card. He knew when she was born as I text him and my brother is in regular contact so I'm sure he knows roughly the date, or could easily find out.
The issue I have is I don't want to get into a situation where he is sending two of my DCs cards but not the other, it doesn't matter so much while she's young but at some point she's going to notice.
We already have a difficult relationship and I'm keen not to make it any worse but I'm going to just have to tell him aren't I? What would you do?