Leah Messer appears to be ready to drop a major secret about her ex-husband, Corey Simms, during a recently-released sneak peek clip of next week's episode of the Teen Mom 2 season six reunion.

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During the preview, shared by Starcasm on Thursday, Messer and Simms are seen feuding, when, all of the sudden, Messer brings up something that was done in the early part of Simms' marriage to his current wife, Miranda.

"Where were you at during the first couple months of marriage?” Messer asks Simms, then suggesting Simms "hit me up!"

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Although Dr. Drew Pinksy, who hosts the reunion, attempts to interject at that point, Simms is ready for action, and encourages Messer to speak on whatever it is she's hinting at.

“Let’s go there. I’m not scared of you anymore," Simms tells Messer.

Then, Simms takes their conversation even further, suggesting he knows secrets about Messer, as well.

"If I did the s**t that she does, I wouldn’t see my kids,” he tells Dr. Pinsky.

While Messer typically speaks out against rumors against her, including allegations of infidelity and drug use, one thing she's ignored is the ongoing claims regarding her rumored affair with Simms, which In Touch Weekly reported on weeks ago.

For more of Leah Messer and Corey Simms, tune into the second half of the Teen Mom 2 reunion on Wednesday, Oct. 7, at 9 p.m. on MTV.

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