Is it considered disobedience to burden one's parents with expenses beyond their means?

We have clarified when the father is obligated to spend on his son and the limits of that spending. Demanding it is not an act of disobedience. Anything beyond that is not obligatory for the father, and the son does not have the right to demand it. If he demands it and insists, causing the father distress, then this is an act of disobedience.