Is a wife entitled to revoke a general power of attorney for her father that was signed out of shyness and without knowledge of its contents, and would her father's anger at that be considered disobedience?

The son has the right to revoke his father's agency, and this is not considered disobedience. However, it is recommended to be gentle with the father when revoking it. It must be known that the father has the right to take from his son's wealth, if the son is in need, provided that it exceeds the son's own needs.