'AITA for threatening to kick my dad out of my wedding for apologizing to his fiancé?'

"AITA for threatening to kick my dad out of my wedding because he kept apologizing to his fiancee whose birthday it was?"

My dad has been with Marissa for about 2 years and they just got engaged. I don't have much of a relationship with her as she isn't a pleasant person. I don't know Marissa's birthday and don't see why I would be expected to, but my wedding ended up falling on her birthday.

When my dad found out the date, I could tell he was stressed. He said she has a lot of trauma and he feels so guilty spending her birthday at my wedding. I didn't say much and figured they could work it out.

Well the wedding was last weekend. I'm not sure if Marissa was upset or not. She is very very stoic so idk, but my dad kept apologizing. When they first arrived and he came to see me in the bridal room he brought her for some reason, and as they walked in I could hear him saying sorry and asking if she was ok.

Right before the ceremony he had her on his lap and was whispering, but I could hear it. He was saying he wished she would open her birthday presents and she was like I just don't want to do it today. Then he said what if she opens them and he buys new ones for the day they celebrate. Then my grandma came over and tried to give her a gift and he was just so annoying about it.

Final straw was during the reception. Marissa was complaining to my grandma how she hates chocolate cake (only cake we had) and my dad took her in his arms and was asking if she wanted to go out later and get something, and again apologized.

I finally snapped and yelled at him, saying that if my wedding was such a burden take the child he is dating and get the f**k out (I meant because of her actions, there isn't a big age gap). He looked horrified and I was like well go. My grandma immediately began to berate me saying that I am awful and that he paid for the wedding.

He asked if I really wanted him to go, and I told him to either shut the f*k up about her birthday or go. He stayed, but was cold the rest of the night and I heard Marissa and my grandma joking about how he should rip up the check he gave me for how I spoke to him. I don't know if I overreacted as he was just having empathy for his fiancee.

Here's what people said in the comments:

Worth-Instruction-43 writes:

NTA. I think those giving YTA comments need to look at the fact that OP could hear her apologising every time. Correct me if I am wrong, but you do not bring your family problems into public, especially during a wedding.

Brightsidedown writes:

My birthday was a couple of weeks ago. My parents forgot my birthday because my Dad had a really bad fall. All I cared about was my Dad. I got on a plane and flew over the Atlantic to be with him.

Active-Pen-412 writes:

The dad suggested opening her presents, then getting new ones to open on the day they do get celebrate? Seriously? How old is this woman? Even my almost 5yo knows better than!

Sidneyreb writes:

Your wedding anniversary and Marissa's birthday will be on the same day every year.

Buckle up, OP, this is going to be a thing forever.

abynew writes:

YTA. Your dad was just trying to keep his daughter and fiancée happy. You’ll take his money but he’s not allowed to talk to his partner? You sound a little spoiled