Is it permissible for a wife to help her husband with household expenses after discovering his betrayal?

The wife is not obligated to participate in household expenses, but it is an act of righteousness and kindness towards the husband. If the husband's relationship with another woman is legitimate (a valid marriage), then that is his right, and he must be just among his wives. The wife has the choice to continue assisting him with expenses or not, and it is better to continue. However, if the relationship is illegitimate, the wife must advise the husband and forbid him from the evil. If he does not repent and the relationship escalates to immorality, then it is advised to seek a divorce.