The law should have nothing to do with the will and inheritance of someone. It should be the decision of the father or the parents to decide whether they would want their child to have whatever they have after they are no more or not if they think he is living a dishonorable and disgraceful life, they decide to take and no court or law should force them to not do it if their child is dishonorable or whatever, it's their child, so just let them decide what to do with the inheritance.

The same should go for the child, there should be no case against the parents in case they disinherit them and don't want to give their wealth to them. A person has all the right to choose who they want to inherit their belongings after they die, even a person who works as a maid in their house or maybe a friend, a relative, or anything.