Can a divorced wife help her ex-husband

My 12 years of marriage ended by taking mutual divorce and I have a 15 yrs old son whose custody is with me.Now my ex-husband get remarry and after his marriage we are not in touch at all and that too my son.Now the issue is that his second marriage is in trouble and a major issue had been happens between them which drag then to put complains on each other in police station.His second wife doesn't agree to give mutual divorce and continue to drag me and harass him mentally that he has to leave his house and she had put lots of alligation on him at women police cell.Now my ques is that ,does it possible legally under hindu marriage ACT being his ex wife to help him in this matter or to support him any way so that he can get ride of this all issues