Situation 1
God tells us in the Bible that we should not hurt our spouse, especially men. A man rules the home but he should not abuse his family. A woman should not cheat on her spouse and have sexual intercourse with nobody else but her husband.
In this case, it would be better if the woman files a divorce or annulment as she is prone to abuses in the household. Another option is helping her husband change his habits as to stop being a drunkard and be a faithful and good husband. If this does not work, she should send him to rehab.