What is the ruling regarding a wife's refusal of marital intimacy after her husband has mistreated her, including insults, verbal abuse, suspicion, and invoking curses upon her and her children, and what are the verses and hadiths that can be used to remind the father to improve his treatment?

A wife's refusal to share her husband's bed is a grave sin. The mother must be patient, fulfill her husband's rights, and strive to supplicate for his guidance and good character. The daughter should advise her father and remind him of Allah, so that he may recognize the wife's rights and the virtue of good character. If the mother has done her utmost and the husband does not reform, then she has the right to seek divorce from him. As for the father's frequent curses upon his family, there is a specific fatwa regarding that matter.