Married Lady is been Tortured, Harrased, Threating to Death, How to get Justice?

Dear Lawyers, I'm looking to help a lady, who's in need of finding solution for her ruined & misfortune Life. Details: Lady came to knew that her boyfriend got recently married, with whom she had love affair from last 4years. She questioned, cried, argued, and the boyfriend said, he married because of the pressure from the parents, and that she's still in her heart until last breath. He convinced her saying: he's going to get divorce soon, and marry her again. Just after 3months, the boyfriend came and met Her, went to the girl’s family, who lives in a remote village, who were very poor farmers, convinced them by pleading, pledging and when they didn't agree, he finally went on to suicide in-front of them. Even though the mother didn't agree their marriage, He finally managed to took the lady and her elder sister with her husband, to a Temple and married there. Then started the real phase of their lives. First Year: Both, started living together as a family, took a very small single room, renting around 2k/month and it went all just Ok for few months, and then started troubles. Suspecting his moves, lady's family & supporters took this man to some lawyers in their hometown and He agreed to do justice asap and managed to escape that situation. Later, she got pregnant, the boyfriend was available only until her 6th month pregnancy, and later He left her idle, switched off the phone, and nobody knows what happened to Him. Oh, btw, he's working in Indian Army. 2 Year: The man returned after 5months only when the lady conceived and the baby was now 2months Old. He said, he was in Siachen, so couldn't able to contact. Both the lady and parents demanded for Registering their Marriage, and he went on giving them promises, convincing them by portraying himself as an innocent but never fulfilled one! Once the situation comes to neutral state, and parents left to their village, He started, suspecting the wife's character, pointing as how she managed all these months without him, started torturing her showing this reason, and he even went on punishing her for unknown reasons. He comes every 3months, stays, for 15-20days, leave to his home town. The lady asked to leave her Alone, and never return in her life. The lady revolted and in their fight he almost forced her to sex, she's pregnant 3 Year: Same routine, torture. Now, its been almost 3 and half years, the lady has 2kids (2yrs & 7months), He neither fulfilled the promised, nor allowing her to lead her life. She's now totally helpless and now with 2kids her life is now a big misfortune. She's almost uncertain how to proceed legally. He made several death threats, to her and threatened to kill the parents, also suicides himself in case She files case against Him. Now, he's also replied several times recklessly that nobody can touch Him, as he's part of Indiam Army. Now, that I've explained briefly all things, how can we Help this Lady, what can the Law do to protect & bring justice to Her!?