This question is for Lawyer. Sir, I need your advice

Sir, My relative's daughter is in a relationship with a Punk boy. And he is a criminal by his profession. Parents are understanding her to not to with him but she does not accept to do that. And She has not talk with that boy from 2 months. Today that boy come beside my relative's house and ask a small child that She is living right now here or not..? That Boy answered Don't know. Then that boy told my relatives that they were asking about her. And That's why they are too much worried. Is there any law in Favour of parents to get rid of it. Please help us sir. You may also contact with me On My gmail :- rajsinhasofttech2018@gmail.com for more information you can ask me there... I will told you whole story about it.. Satyamev Jayate 🙏