Husband and wife

1. My wife left me and my 8 yr old son 1 year ago 2. Since then she never showed interest in coming back. 3. We both do not have intentions to live together 4. My son living with me happily, he is going to school and I have left my regular job to take care of him. 5. After she left us, I use to allow her to talk to my son over what's app call. 6. She is living in other city and I guess she is working but I do not know any of her residence or working office address and details. 3 months back she said she want to meet my son. When I asked her first share her residence and office details she said she won't share so I said unti i know your details I won't allow my son to meet her. Because I am afraid that she might take him away from me. 7. 2 months back she visited my son school without informing me and asked school to send my son with her. But school authorities told her to wait until I comes and allow. By the time I reached school she was not there and left the school. 8. Since then I didn't allow her to talk to my son. Now she is telling she has rights to meet him. But she never wants to share her details. She is very rude in her messages to me and not kind. I am also stressed and planning to divorce as she is not showing any interest or have any intentions to come. But she says she want to take my son away. But I feel and after seeing her for last 10yrs of living with her, I feel she is not mentally prepared to take care of the son. B Everyday I am under stress thinking she might take away my son without my knowledge. Please suggest