Will i get locked up if my ex wife says I forged her name on furniture we had together while we were married?

This happened three years ago. My ex wife say I signed her name as a co-signer, but I don't believe I did. We bought so much stuff together. I even co-signed the car she drives now. I filed bankruptcy and this debt fell back on her so she is mad. She says she is going to get a handwriting ysis done that I am going to have to pay for. She calls my family and tells them she is going to get me locked up. I have never been in trouble with the law. I pay child support to her, but if I am locked up she will not get it and file another lawsuit for child support when I am out. It seems like every other month she is trying to get me locked up or in trouble. What can I do? Will I really get locked up? Can she prove I did it?