Leah Messer may have just dissed her ex-husband, Corey Simms.

'Teen Mom 2' Custody Battle Poll: Are You Team Leah Messer Or Team Corey Simms?

For over a year now, the Teen Mom 2 star has been locked in a bitter custody battle with Simms and his wife, Miranda, over their twins, Ali and Aleeah, 5, and on Twitter, Messer appeared to have a telling message for her former partner in regard to his alleged trash-talking.

“Your Ex is not your child’s Ex,” Messer's re-tweet, a quote from DK Simoneau, began. "They love your ex just as much as they did before. Do not talk down about someone they LOVE! Do NOT make them feel bad for loving their own parent! They did not choose this. Choose your kids first!”

'Teen Mom 2' Leah Messer 'Thrilled' To Reunite With Twins: Details About Their Holiday Weekend

Messer's ex-husband filed for full custody of their twin girls last year, and in October, as reported by In Touch Weekly, Simms was granted primary custody of their daughters.

“Leah’s really been screwing up since then, so Corey took her back to court," the source explained. "The judge looked at the girls’ school records, which show that they’ve been late for school, and made the change in custody.”

The magazine's source alleged Messer often took the girls to school late, or not at all, which prompted the judge to give custody to Simms, with Messer seeing the girls on weekends.

Tags: leah messer MTV Reality TV Teen Mom 2 Corey Simms