She should know that pressuring Eric to stay together might have the opposite effect. Gloria is going through a period of being depressed and feeling simply unable to move. This is not uncommon. Therapy can help. Also, many women report that their work gives them a newly-renewed sense of self that saves them.
Men tend to recover through introspection and understanding of the marriage.
Again, therapy can help. Gloria is not just angry. She has feelings of wild and uncontrollable rage. She wants to retaliate against Eric. Fortunately, Gloria is strong enough to resist these urges.