How to disown my divorced wife and an adult son.

The biological son of you will have his right for your inherited property beyond any reasonable doubts. 

Your message suggests that he is a major so obviously he is not entitled for maintenance u/sec 125 crpc.

Your wife (divorced) can get maintenance if she can prove the grounds of eligibility

A repeated query with some modifications.  As suggested once a final settlement is done through a compromise,  that compromise through Legal Services Authority gets authenticity as award so that you can forget the issue once for all.

She's not your wife any more.     No question of disowning.    But you can't disown maintenance.

Yes.     The Experts are right.     The son is not entitled to maintenance.

The son, unlike his mother, is supposed to maintain himself.    Strange law.

Gender bias in these days of equality.