I can't condone what you are doing....

I honestly would keep your own personal opinions and values to yourself and keep it her problem. Don't make it yours too.

You can call her all the names in the book, but there's no point because there's no guarantee she'll start believing the same things you do. Leave her be, because calling her out on it won't make her remorseful.

I'd get worried if she somehow develops some sort of emotional attachment to him and starts thinking, "OMG I HOPE HE LEAVES HIS WIFE FOR ME!!!" But from what I've read so far he seems like he's just a piece of ass to her.

Let her get hers and hopefully a better looking, AVAILABLE man comes around eventually.

Just stay out of it.