Is it forbidden for a wife to withhold money from her husband who has been found to be in a relationship with another woman, and who threatens her with abandonment in bed to obtain money, knowing that he has become miserly after having been generous with her?

A woman's money is her own property, and she is not obliged to spend from it on her husband; rather, her maintenance is his responsibility. If the husband is in need, it is an act of kindness for her to meet his needs. Regarding the discovery of the husband's relationship with another woman, we advise handling the matter wisely to preserve the family and children, and to confront him and advise him about the seriousness of this, if possible, or to seek other means while trying to bridge the gap. Perhaps there was a shortcoming on her part. It is also possible to involve righteous people to mend the rift.