“I don't know if he duped me regarding the car lease. I mean, why wouldn't he ask his own wife to co-sign rather than a parent or a friend? I'm the one who makes the most sense, being the closest to him.”

Firstly, I’m really sensitive to these kinds of things and I don’t mean to harp on the car.

You said he told you he could only get the car if you signed. You said he is in the auto industry. So you just believed him and signed. Maybe he told the truth and your signing was the only and best way. Maybe he could have gotten a car without you and paid a higher rate, and if you had known that, you might have elected for that option. Maybe he knew that, being in the industry, and he told you otherwise. This just bothers me because he also has a history of taking money from you and demanding high price things you don’t think wise of you to spend, but have given in. This was to his advantage. If only he had signed on a car and you divorced, possibly you still would have to pay some of all of it anyway IDK.

These are just my thoughts, we don’t have to discuss. I understand you best option is to get him to pay for his own car now.