So she is miserable, won't talk, and in a crappy mood all of the time, and you are asking if you should reward this behavior?
Nope. You don't have to be a jerk about it though. Go do something you enjoy doing.
yeah ......that makes sense. And your description is spot on. A friend recently asked me did she catch me cheating on her as that was the only thing he could think of to make someone so angry and bitter