My fiance's uncle, the uncle's girlfriend, and two children just showed up to our welcome party. The uncle and girlfriend were invited to the wedding, but not the children since we are having an adults only reception. The uncle shares custody of his two sons and he has them for the holiday so he decided not to attend our wedding because he wants to spend time with his sons which is totally understandable. My husband's aunt (the uncle's sister) came from Florida for the wedding. The uncle decided to come to the welcome party because he hasn't seen his sister in a few years. He also wanted wish us well. He drove 1.5 hours one way to attend the welcome party. I feel really guilty now because he can't attend due to his children. He hasn't said anything to make me feel guilty, but I do. This was my first time ever meeting him. Part of me wants to see if I can add for more people to our wedding to allow the uncle to attend, but I'm worried the other guests will get upset because we didn't allow other children. Should I just let it go or what would you recommend?