AITA for throwing a tantrum at my daughter's wedding after I paid for it?

Hi, I (M50) am the father of a wonderful girl (F25). I am divorced and was remarried to a woman with two kids of her own. My daughter's wedding was this last weekend. I paid for everything, I was really generous with her on the budget. I easily spent almost 150,000 on it, and the wedding was, in my opinion a raging success.<br><br>My daughter has a stepmother and two step siblings. I also paid for my son to attend, but did not pay for the step siblings. I also did not invite my current wife. I did this because my daughter asks that her biological family and my new family not intermingle, which I respect. My son and daughter are close, so I paid for his wife and kids to come as well.<br><br>Things were going well until a photographer blocked my daughter and son from walking down the aisle because he wanted to get a good shot. My son, who is a very difficult person, took exception to this. He began shouting at the photographer, who began shouting back. My daughter started crying, and there was a huge commotion.<br><br>I went over to my son and asked him to stop, which he did. I passed the photographer a twenty and told him to go outside for a minute. My daughter was still very upset, and I told her it would be okay, but I really wanted her to go down the aisle because I spent a lot of money on this wedding and I wanted to get my moneys worth. My daughter started crying more, and my son told me I was an asshole.<br><br>From here things just got worse. My daughter and son began fighting. I yelled at them to stop, but they wouldn't. They started saying I was putting the money I spent on the wedding ahead of her wedding, which just goes to show how ungrateful they are. I think they are both in the wrong here, but my wife agrees with them.<br><br>So AITA here?