So I have been friends with the bride since we were 10 years old (now 31). In fact, as kids/teens we were best friends but grew apart as I went off to university. However, we always stayed in touch. She now lives on the same street as me, my partner, our baby, my daughter (from a previous relationship), and his two girls (from his previous marriage). She also has two kids who play with our girls. Here is where the problem lies, she is getting married next year and has invited me. She has also specifically invited my partner, our baby, and my daughter from my previous relationship (our girls have been friends since they were babies). However, she hasn't invited his two daughters who only live with us half the week. He has become extremely upset over this and has decided if they aren't invited then he won't go. I am not sure what he wants me to do about it because I cant ask her to add two additional guests onto her wedding. I am also not going to miss her big day as she is one of my closest friends. My partner is angry with me over it but I have said I am going to go whether he attends or not. so, am I the asshole?