TIFU by defending my wife against my mother in law.

Long story short, my in laws are staying with us for a few more months going on six now. They're miserable people have terrible relationships with their kids the only caveat being they're not terrible grandparents. My wife and MOL have a strained relationship and my mother on the other hand is great with us and the kids, regularly plans events/times to see one another and makes an effort to make things nice when she wants to host. My MOL on the other hand doesn't buy gifts for people, doesn't plan ANYTHING and lives off of doing everything last minute. She's also unreliable and can't be asked to contribute to family events.

I woke up Tuesday morning early to help make some Christmas cookies and we were both up around 5am baking until about 8am where I decided to go shower, in the fifteen minutes I was away my MOL cornered my wife in the kitchen and was verbally berating her mostly because she's emotionally immature, addicted to weed edibles and kratom, and can't take any form of accountability so she was blaming her daughter about their 'failed' relationship. I've been listening to this for years but this is the first time I've ever had them under our roof, the last week in particular she's been going out of her way to pick fights attempting to make everyone miserable before the holiday like she is. This argument specifically was about how the two of them weren't close.. and how she was hurt she was being 'excluded' from the holiday, despite living with us and choosing to chain smoke and nap all day as opposed to participate in life.

I eventually come back in the kitchen and say something along the lines of " We've done Christmas Eve at my moms, and Christmas Day here for eleven years now.. why are you so surprised? " she proceeds to tell me to " shut the fuck up " and I.. well went off a little bit. Said I wished she had it in her to shut her mouth, said she can do whatever she wanted In her own home.. but she doesn't have one, and then called her golem from lord of the rings after she was screaming and growling like him. THEN she and my father in law ran up on me, getting in my face saying "TOUCH ME MOTHERFUCKER" meanwhile I laughed in his face and the whole situation ended there.

I'm not proud of what I said and have expressed guilt to my wife who's not nearly as upset about it all, but I'm just hoping that the rest of the holiday/next two months will blow over easy enough and they'll get the hell out ASAP. It was the third or fourth night listening to her harp and be critical of my wife and I legitimately couldn't listen to another second of it.

TL;DR: Defended my wife by saying some stuff I've had against my mother in law for years, immediately regretted my decision.

Edit: Will try to hop on here later this evening with an update, mostly just regret personally attacking my mother in law not standing up for my wife. I'm want to kick them the fuck out but doing what the misses wants, they're moving out of state soon. And my father in law is a tiny fat little man, which is why I laughed in his face. He obviously didn't want to fight and was putting on a show for his wife, which is funny because they hate one another too.