Is it permissible to divorce one's wife if she talks to her mother about matters concerning the spouses, which makes the husband feel insecure and affects the privacy of the marital relationship?

A wife's act of disclosing marital secrets to her mother goes against the Sharia's command to preserve secrets, especially between spouses. Divorcing her simply out of fear of future disclosure is not advisable. Instead, she should first be advised, guided, and informed of the relevant religious texts, as she might be ignorant or heedless.