In Texas can a divorce be voided after the final degree has been signed off on by the judge?

So I am getting remarried in 3 weeks. I have not seen or talked to my ex wife since January, she didn't appear in court because she was incarcerated, now that she received her divorce papers, she is saying she is going to tell the judge she is pregnant and wants the divorce voided... She knows I'm getting married... Can she do this??