If a husband engages in drinking or adultery, is the wife still required to fulfill her responsibilities, such as cooking and intimacy, or can she refuse him and choose to live separately until he repents?
Wife must fulfill her duties towards her husband even if the husband is a bad person committing sinful acts. Husband suns are on him but it can never exempt his wife from her duties as a wife. Her suffering because of her husband's bad deeds will add in her reward as patient person as lady Asian tolerated her very bad husband Firaon.
Wife can not refuse her husband nor live separately. Yes she should never help him in any wrong act.
'Wassalam.