Is the husband entitled to take the gold that his wife bought with her own money after he discovers her betrayal and asks for a divorce?

A person killing himself is one of the major sins. Repentance erases what came before it, and one who repents from a sin is like one who has no sin. Allah Almighty accepts repentance from His servants, and Allah Subhanahu wa Ta'ala forbids His servants from despairing of His mercy and forgiveness. The husband should conceal his wife and not expose her situation, and he has no right to her money, even if she betrays him.