Vowing her daughter will not be married and the daughter gets married

Q: I promised to marry my daughter to my nephew, whose father has an evil eye, and for that reason my wife opposed to that marriage. After this one of our daughters fell into a fire. After she was admitted to the hospital, my wife vowed that if Allah let our daughter’s wounds heal, the marriage with this man’s son would never be completed and I should never sit near this man, due to his evil eye. Whenever he looks, speaks, or is seen by her in a dream, he is always focusing his envious gaze or words, so she says that she does not want any association with this man or for his son to marry our daughter. I am the father of this daughter, if I marry my daughter to this man’s son, what is the ruling on this marriage after this vow? Her mother has never been happy with this person, but should this affect the marriage? Am I being sinful for continuing the marriage despite my wife’s refusal? (Part No. 23; Page No. 116) We hope that Your Eminence will help us solve this family problem and explain about this person. We hope that you will give us a legal ruling as soon as possible. What is your advice to my wife? Is she sinful? May Allah reward you with the best and save you from all evil.

A: If the situation is as you mentioned and Allah cured the injured girl and the marriage with your nephew is concluded, the mother will have to offer Kaffarah (expiation) for her vow by feeding or clothing ten poor people, or freeing a believing slave. If she is unable to do that, she has to observe Sawm (Fast) for three days.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.