I'm thinking of threatening the father of my son to tell his wife about our kid, if he doesn't pay for things I need for him
You are going to threaten him?
I will threaten him and I'm going to do it if he doesn't pay for these things
Sounds like you're in a difficult situation. He should be supporting you if he's the father. You may have to take him to court.
No, I don't need to go to court. He already knows that I will bite and he doesn't want my son's life to be affected.
Threatening to expose your son's father to his wife seems to be causing much stress in both your and his lives, and possibly may also be affecting the child. Don't you think it would be better to have a third party intervene to work out a plan for child support?