What are the limits and conditions for the validity of stipulations in the marriage contract, what are the consequences of violating them, and is it permissible for the wife to stipulate that her husband not marry another woman, otherwise her divorce would be in her hands?

The fundamental principle concerning conditions in a marriage contract is that they are valid and obligatory to fulfill, based on the Prophet's (peace be upon him) saying: "The most deserving of conditions to be fulfilled are those by which you make intimate relations lawful." If a woman stipulates to her husband that he should not marry another, this condition is valid. If the husband violates it, the wife has the right to annul the marriage and receive all her rights. The option of annulment is established for her, to be exercised at her discretion.