Does divorce occur or is the husband's oath binding if the wife accepts 50 pounds from her mother to increase the maid's wages, after the husband swore, "By divorce, I will not increase it a single pound until I die"?

Divorce does not occur if the wife accepts the money from her mother, because the husband conditioned the divorce on his own action, not the action of others. However, if the husband said: "By divorce, I will not increase the maid's salary," and then he increased it, then the divorce here depends on the husband's intention. If he intended divorce, it occurs; otherwise, divorce does not occur, and he is liable for an expiation for breaking an oath (kaffarat yamin (definition)). In summary, there is no harm in the wife's mother paying the maid the money, and the husband does not violate his oath.