What should a man do if he discovers that his wife's mother suffers from a mental disorder that affects her offspring, and is it permissible for him to divorce his wife or cease procreation with her?

The symptoms that appear on the

wife are not defects that necessitate the husband's option [of annulment], and her

marriage is valid, with its rulings taking effect. If it is proven that these

symptoms are hereditary and can be passed on to offspring, and the husband sees a

benefit in divorce, then there is no impediment to it.