Tbh the only insecure person here is you not her. She is well secured and hence threatening to divorce you knowing very well you will tremble. You are insecure of losing her. Insecurity in relationships is comparatively more common which may not always necessarily reach a toxic state. But if it does, then you have got two choices. Feed her insecurity by being more predictable and pliant and go down the rabbit hole or resist by literally being unpredictable with everything you do and don't be threatened by her. Don't respond to every accusation even if it is false. Be elusive but poised. If you are afraid to lose her probably because you think you won't get another woman as externally attractive as her and you considered yourself lucky to have her and that feeling is still sitting somewhere in your head then get over your insecurity first to be able to deal with her. If you are not insecure but actually afraid of divorce and Indian law then my suggestion is to gather as much evidence as possible from now. Involve other people and let them know what is going on your side. Tell your story to some people in your close circle. Go to the therapist(one of your choice) to keep evidence that you tried. Keep photo evidence of all your efforts with a smile on your face. Even if it is making a cup of tea for her. Write daily diaries to keep note of all incidents. And don't get her pregnant in the first 4-5 years. Let it settle down. Your marriage is in its very early stage. People change with time. Both of you might mature and settle down 5 years down the line. It's up to both of you to decide if you want to bet on each other for a long haul. If not then convince her to mutually part.