How’s that for loyalty?
He doesn’t have any.
Good for her for taking out the trash.
In marriage, loyalty is a two way street. Things may have been building up for years, this could have been the proverbial straw. She's had time to stew. Think of all the things they didn't do or have because he's chasing skirt. I'll bet she made a ton of sacrifices for his career and this is how he repays her.
OUCH!
That is probably gonna leave a mark.