question #3 Sahih Muslim 1026, Book 12, Hadith 107 : What is the significance of a woman spending from her husband’s earnings without his approval in terms of reward?

These are some of the a hadith of Muhammad. the Messenger of Allah (ﷺ), transmitted to us on the authority of Abu Huraira. So he narrated one hadith out of them (as this): The Messenger of Allah (ﷺ) said: No woman should observe fast when her spouse is present (in the house) but with his permission. And she should not admit any (mahram) in his house, while he (her husband) is present, but with his permission. And whatever she spends from his earnings without his sanction, for him is half the reward.