The father promised to inherit a house for his son (another daughter) before his death, but after his death, the mother broke her word and sold the money for her own use. What is the son's opinion?

It depends on the nature of the house and whether you have property for your parents! If it is your father's personal property, as long as you can produce your father's will, you can go through your own inheritance and transfer procedures according to law after the notarization of the will. Your mother has no right to interfere and regret, and it has nothing to do with her. If the house belongs to your parents, then your father only has 50% right to dispose of the house! The other half is your mother's rights and interests, so ~ ~ If your mother goes back on her word in this case, it will only terminate 50% of the agreement given to you in her name. You can claim your father's half, as long as the will you said exists and is legal, then ~ ~ Now you and your mother are both * * * people in the house, each with half rights and interests! The situation now is that neither of you can sell the house alone, and you need to negotiate to solve this matter! If you can't reach an agreement, you can take the evidence to the court to apply for a judicial ruling!