Is it permissible for a woman to complete her marriage to a man her mother did not approve of, especially since all of this occurred without her mother's consent?

We do not advise divorcing the wife merely because the mother is displeased. Rather, he should keep her as long as she is upright, while still honoring his mother and father. The husband should strive to appease his mother and convince her of his marriage to that woman, and that what the mother felt is not a justification for divorce. It is preferable for some wise people to mediate to convince her.