I do regularly save a small amount of the housekeeping money my husband gives me without him knowing. I do this with the intention of using it in the future. Am I deceiving my husband by doing this?

Question

If the man gives his wife a certain amount of money to spend on the housekeeping, and she is able to manage it well and save some of this money to use in the future, then there is nothing wrong with this, but that is subject to certain
conditions: (1) That this does not involve deceiving or lying to the husband. (2)That no constraint should be caused to the husband and children as a result of that saving. (3) That this saving should be in the interest of the family as a whole.