2. Does not know how to keep private business private
Knowing where to draw the line when sharing either with friends or even online is a required trait these days. This is not a problem that plagues just women and it is just as bad in men as it is in women.
So generally when you notice a partner who takes sharing to a level of over-divulging private business and even things that should be kept secret, you may way want to take one or two steps back and reassess the situation with her, too.