If you have minor children you can’t possibly argue that you have rights to do absolutely anything regardless how it effects them. That isn’t how it works.
Of course if her paranoia is caused by mental illness then she has a responsibility to seek help and proper treatment. When you become a parent, your rights to do whatever the heck you want are suspended at the very least until their are grown up.
Saying “she has rights for her paranoia even if it messes with her son’s life” is just quite awful. It sounds extremely irresponsible. That’s not how parenthood works at all