What should be my course of action in this case?

My girlfriend's parents were keeping her under house arrest since last month after they found out about us. They took away all means of communication away from her and she was not being allowed to leave her house. Moreover they were putting her under immense pressure to get married but my girlfriend is just 23 and wants to establish her career first before getting married. But even after countless efforts her parents were not ready to wait so eventually she ran away from her house and came to my city. I helped her get a flat on rent and other basic amenities. Now the biggest concern for us is that since her parents know about me so she is very sure that they will come after me and might press legal charges against me. Since both of us are at a stage in our lives that we are just beginning our careers so we do not have that financial base or security to afford to fight a case in court of law. Her parents even threatened her once that if she runs away they are going to file a case against her and me of theft of 10 lakh rupees from home. I want to know that what possible charges can they file against us and that is there anything that we can do beforehand from our side to prevent things going very bad for us? Any advice would be of great help. Thank you.