Is a wife's grief and distress over her husband giving a sum of money to someone considered a sign of dissatisfaction with Allah's divine decree and destiny, and is it considered major disbelief?

The wife's dissatisfaction with her husband giving money to certain individuals is not a sign of discontent with divine decree, nor does it lead one out of the fold of Islam. One must be wary of obsessive doubts concerning disbelief. The husband has the right to dispose of his money in ways that are Islamically permissible. If he spends it in an improper manner, the wife should advise him against wasting money. However, if he spends it in charitable ways, she should rejoice in that, due to the pleasure of Allah and the reward it entails.