I don't even feel like I can let my guard down around him, so I can't imagine how it is for her.
I just get really angry, and sad, because the way he treats her is not normal, and yet he acts like it's fine and because she won't speak up, he keeps doing it.
She seems to have accepted "that's how he is" but I don't know why she stays with him if she has to be so walled all the time, ready for the next remark.
I don't even feel like I can let my guard down around him, so I can't imagine how it is for her. He seems to communicate in a sarcastic, detached way most of the time, where everything is a joke or a jab.
My guess is that in private, she has probably objected to his remarks and this is how it went down.