So my SO and I agreed on Kamren's birthday outfit and theme months ago, then when it was time for…

So my SO and I agreed on Kamren's birthday outfit and theme months ago, then when it was time for him to purchase her outfit (I bought her halloween costume which wasn't cheap), all of the sudden it's I never agreed to this and since I'm buying it I'm choosing an outfit I like, so I said ok, he bought this ugly purple outfit that has nothing to do with the theme we chose. So I went ahead and purchased the original outfit, so now kamren's first birthday will be at my sister's house without him as well as all the presents and decorations I bought.....he hasn't bought her anything at all. Until he want's to contribute that is how it is going to be.