Must I obey my husband and live with his family after being harmed by the actions of his brother's wife, which affected my relationship with my husband and the health of my infant daughter?

It is the wife's right that her husband provides her with independent housing, and he is not permitted to compel her to live with his family except with her consent; this is because they may harm her. If the husband provides suitable independent housing that causes no harm, the wife is obligated to accept it. The foundation of the marital relationship is affection, mercy, and understanding.