I(28M) and my wife(29F) got married in May. We had the wedding at this beautiful hotel. We had about 150 people attending. I have one friend(29M) who has a service dog and is in a wheelchair. He was in an accident a few years ago and is paralyzed from the waist. His dog is always well behaved and nobody made a fuss.

My cousin(32F) has a Great Dane that is untrained and nobody in the family likes the dog. I made it clear to her many times the dog was not welcome to the wedding. Well the day of the wedding, she shows up late with her dog on a leash. My father and I were furious and told her to leave with the dog. She refused and then let the dog off the leash. She promised he would be on his best behavior. He started jumping on people, tried to play with my friend's service dog and overall was upsetting everyone there.

My cousin's defense was that he's a therapy dog and she can't leave without him. She then pointed out that my friend brought a dog to the wedding, so it wasn't a big deal. I started yelling at her that there was a huge difference between a well trained service dog and her dog. Everyone was starring at us at this point and she grabbed her dog and left crying.

My Aunt approached me after the wedding that I didn't have to embarrass cousin like that and she was struggling with mental health. I explained that I had told her many times before the wedding that the dog was not welcome. My cousin is now trying to paint me as the bad guy. She's sent me multiple messages demanding an apology.

AITA for embarrassing my cousin in front of everyone at my wedding?