@Katy ******
can I give you 2cents of HR advice - These times have got everyone tense and under pressure, quite often bleeding into our workplace. As a result people tend to make decisions about quitting without objectively considering the long term consequences. My advice to your friend would be take a step back, perhaps even a few days off and regroup to objectively consider her options, including whether she could make personal changes at her job that could make it a bit more tolerable. I obviously don't know the full story but I know that making a move based on emotion rather than objectivity can backfire. Food for thought, hope it all works out ok for your friend