One of my sons was taken by a crazy women, now paying child support for years and harassed for a child that is probably not his. He even tried to be a father to her, and I a grandma, but the woman was so cruel and only wanted child support we couldn’t do it. We found out that she says she was raped when my son was dating her, and refuses a DNA test, as it doesn’t matter because he signed the birth certificate, so he has to pay.
Sorry for what is happening to your son, being a nice guy has it’s consequences.