How would you handle this?

TL;DR -- Son's serious live-in GF is a bit of a bitch. Pretty sure she did something to screw up my brother's bathroom and let my other son take the blame during a recent family trip to Portland for Thanksgiving.


So my oldest son met this chick at college. She's pretty, relatively smart, but extraordinarily spoiled. Not spoiled in the "her parents have money" sense, but in the "i'm an only child who has had mom there for me at every step" kind of spoiled. She's straightened him out pretty well. They're both in college and living in an apartment together and I would be shocked if they don't end up married.

I can't stand her. Like I've tried so many times to just be nice and accept her faults but I just can't get over them. Few examples...they come to our house for Christmas, I buy her a $100 meal, don't get a thank you. She doesn't tell me "hello" unless I say "hello" first. I'm down in the man cave one night playing darts and drinking with my son until the wee hours of the morning...this bitch comes down there 3 times to make him come to bed with her with the last time having her beat the shite out of my door. Same man cave, they bring their big arse dogs for a visit and lock them in the cave. frickers screw up the paint around my door scratching to get out...this bitch says the paint was already messed up!

Anyway, last week we go to my brother's house out in Portland, OR. I pay for her ticket to come along, of course. She's a fricking bitch the whole time. Doesn't want to eat what we're all eating, bitching to my SIL about her having to sleep in a room with a little kid, just spoiled bitch shite.

One morning, I learn that my SIL is angry because someone puked all over the upstairs bathroom...on the rug, toilet, floor, everywhere. My other son, who we made take a shot of Johnny Black, puked so it was assumed he made the mess. I talked to him and he said he cleaned up after himself. I believe him because he came downstairs after puking and hung out a little bit longer. Then it dawns on me...ole bitch was drunk as shite (stumbling down some stairs kinda drunk) and, if she had to puke, would've used that same bathroom.

She never admitted to puking. She heard me getting onto my other son about leaving a mess and didn't say shite. This takes her bitchiness to another level and therefore my dislike of her.

So what would y'all do? Do you sit down your son and tell him to run far, far away from this chick even those he's extremely happy and they're doing well living together? Or do you just grin and bear it, let them do their thing? Or, maybe third option, sit her down and tell her what you don't like about her?

Tough situation. Sorry for the long rant.