What is the reason for the sudden change in the husband's behavior, who started yelling at and hitting his wife just two months after their marriage, despite them having been loving and understanding before marriage?

The questioner and her husband are advised to repent to Allah for their past relationships before marriage, to perform Ruqya (Islamic exorcism), and to review their relationship with Allah; for neglecting obligations is a cause of enmity and hatred. It is then clarified that a wife's leaving her husband's house without his permission is impermissible, and she must repent and return immediately. Furthermore, a husband's beating his wife without a valid reason is an injustice, but divorce is not advised; rather, patience and striving to reconcile him are recommended, and one should beware of those who instigate divorce.