Do understand that according to the Shariah, even if something is perfectly permissible, not Waajib, it becomes haraam if the permissibility is pursued in conflict with the orders of parents. This is a principle to remember in your relationship with your parents.
Another example: It is not permissible for a father to appropriate the wealth of his son without the son’s consent. But if he does, and even if he squanders the son’s money, the son does not have the right to remonstrate and argue with his father. The error of the father will be subjected to scrutiny in the Divine Court. But the son has to comply. Yes, the son may employ diplomatic methods to conceal his wealth if his father squanders it.
A further example: It is Waajib for a father to treat his children (sons and daughters) equally in the matter of gifts. However, if he prefers one son over the other by giving the son substantially more than the other one, then the deprived son has no right of objecting or becoming displeased with his father. The father will have to answer to Allah Ta’ala for having failed to observe the Waajib equality measure.
Notwithstanding the aforementioned principle, it should be remembered that it is not permissible to obey parental instructions and wishes if these are in conflict with the Shariah. Decline politely with respect, and patiently accept the reprimands and rebukes