Does the wife have the right to dispose of her salary without her husband's knowledge?

Question:
May Allah reward you with good, and may He do you good. A female listener says: I am of Egyptian nationality. I am asking and saying: I am a working wife, and my salary is higher than my husband's. I am also given a housing allowance. I used to spend on my children on the pretext that I have more money than my husband, so I would save whatever was left of my money. The husband used to spend on the children from a credit card. Does the husband have the right to know what she is saving? Her husband has passed away. Is she sinful? And what must she do? May Allah reward you with good.

Answer:
Her salary is hers; she may dispose of it and save from it whatever she wishes. Her husband has no right to object except to what she allows from herself, unless her husband made a condition upon her at the marriage contract, making the condition that the salary would be shared between them and that she would spend from it on the house, and that he would allow her to go out and work. If they agreed on this at the contract, then it is obligatory to fulfill the condition, as the Messenger of Allah (peace and blessings be upon him) said: "Muslims are bound by their conditions."
As for if there was no condition, and this was something she volunteered for her husband, and her soul was pleased with it for him, then it is good, but her husband has no entitlement to it, and what she saved is hers.