“Suppose she files because her husband is cheating?”
Work through it? Shoot the paramour? Look in the mirror and remember the times you put him down? Go to one of the numerous Christian marriage healing programs? Learn to cook? Make your sister and her husband move out and quit mooching? I know one couple that sold everything and moved to another state, and found new jobs, just for a decade to heal the marriage. It worked out great.
Or,,,she could watch that divorce porn chick movie “Fireproof”. Only pretend like SHE is the guy who needs to hustle to save the marriage from the straying spouse?
The imagination runs wild.
Pat Robertson, is that you? ;-)