So myself and my partner have been together for coming up to 5 years now. We have 4 children between us. He has 1 DD, I have 2 DS and we share a DS.
My SD turned 15 last week. She had asked for merchandise from a Harry Styles concert her dad took her to the month before as her birthday present. Absolutely fine. A couple of weeks after this he asked me what I was getting for her birthday. I said I assumed the merchandise was from both of us as that is what we do for the other children and applies to them all at Christmas. Conversation over. In the meantime I bought her pls card and present from the other kids etc and made sure they gave them to her the weekend before her birthday. (She has other plans so we didn't see her as we would usually). We FaceTimed on her birthday etc and then saw her briefly last weekend as again she had other plans (a lot harder to keep to the usual arrangement as she is getting older and seeing her friends etc). During the week I asked her dad if he had gotten her a card, which he hadnt, so I prompted him to buy one.
Anyway, she was a bit quiet with me at the weekend whilst she was here and seemed a bit off. I asked DP if she was ok and he said she was fine. I've just gone into the room she stays in when she is here and her dad has given her the card but not bothered to include my name in it.
I feel really annoyed and am now questioning whether she knows her present is from both of us or is thinking it's just from him and I've done literally nothing for her birthday.
I don't know whether im overreacting here or whether I need to say something to DP about this as feel it's pretty unfair or whether to message SD directly and tell her im mortified incase she thinks I've ignored her birthday. Or something entirely different.