Sounds like you pulled off a great party! Congrats to your son and his fiancee!
Eric is right. The MLCer will use anything they can to justify their actions. Some of the excuses are ridiculous. One of the ones my H used on me a year ago is that I hadn't planted some flowers he had brought home. It didn't seem to matter to him that the rototiller he told me he'd fix and till up the flower bed for me didn't happen. Or that I was very busy putting together the wedding reception for my son and DIL so that I didn't get to it by hand.