What is the ruling on a wife prioritizing her family over her husband and refusing to emigrate with him to a Muslim country, and does she have the right to prevent her husband from taking their youngest son to raise him upon the religion in a Muslim country?

A wife is obligated to obey her husband in relocating with him to his Muslim country; otherwise, she is disobedient (nashiz). She is not permitted to obey her parents if they instruct her not to travel. In the event of separation, the father has a prior right to custody if the parents differ on the country of residence, and the best interest of the child is to move to a Muslim country, as residing in disbelieving lands poses a danger to one's religion and morals. The arbiters in matters of custody are the Sharia (definition) courts or Islamic centers.