You are letting a 3 year go with his mother to a place you suspect is, at the very least, a drug dealer's house?
When is your court date for the child support? Have you also filed for custody?
I wouldn't let my kid go anywhere that I had those suspicions about, with a woman who is clearly comin unwound.
That's your hard line stance - well...it would be mine if I were you.
Do you know OMs name? If so, your locality might have a court website where you can run a lite check on him. It's not foolproof but if the capability exists, you might glean something helpful from it.
No, HE is not the issue. But WHO he is and what kind of person he is, definitely is an issue.
F her, as Jack so eloquently says.
But do what you have to do to protect your son. He isn't even old enough to tell you what he's seeing and hearing when he is with her.
You're doing most things right and are leaps and bounds beyond people with your same amount of time in this mess. That said, you need to get yourself some hard information.
I would start gathering it soon.
Definitely before court.
"Let anyone who thinks he stands take heed lest he fall" 1 Cor. 10:12