Would the wife be sinful if she sought a divorce from her husband due to harm, given that she cannot conceive again due to the critical nature of her health, while the husband desires to have children, which has led to a cooling of the marital relationship and transgressions on the part of the husband?

There is no sin upon the wife for seeking divorce if the husband treats her poorly or does not fulfill her needs, for the prohibition against seeking divorce applies when there is no harm.

However, divorce is not an easy matter; it should not be resorted to unless all means of reconciliation have failed.

It is preferable for the spouses to remain together and live amicably as much as possible, especially if there are children.

It is advised to communicate with the husband, strive to reform him, and seek assistance from relatives or religious scholars.

If that does not help, then the wife should weigh the harm of divorce against the harm of remaining in that situation and choose the lesser of the two harms.