'Teen Mom 2' Reunion & Recap: Leah Messer Confirmed Third Party Of Corey Simms, Miranda; Denies Live-In Boyfriend

The reunion special on "Teen Mom 2," which aired Wednesday brought forth some major drama. Leah Messer was finally revealed to have had an affair with her ex-husband Corey Simms.

According to InTouch, Leah made the revelation to Dr. Drew, while Corey and his wife Miranda were just a few seats away. Hearing the confirmation straight from the horse's mouth, Miranda stated that Leah is being "disrespectful" to her marriage, but the latter said that she was sorry about it.

"Things happened that shouldn't have happened and it was disrespectful to Miranda and I have apologized," Leah remarked during the confrontation. "That's the only time that I disrespected her. Any other time I have never, ever let my kids say anything about her. I even told them that I expect them to respect Miranda as their stepmother."

According to Perez Hilton, rumors surfaced early on about Leah and Corey hooking up on his truck while the guy was just a few months shy of his marriage to Miranda, but these were not confirmed until this week's revelation. It looks like cheating is already a habit for Leah. Viewers should recall that back when Leah was about to marry Corey, she cheated on him on the night before their big union, the blog site stated.

The reunion has been pretty tense as the three people involved still have other issues to thresh out between them. As Perez Hilton reported, Corey and Miranda are also responsible for spreading rumors that Leah is into drugs and a concerned friend spoke up for the reality TV star about this issue.

"She is really hurt by this. She's not perfect and she knows that but she's doing so well, and she loves those kids more than anything. Leah's considering putting Gracie and Ali into therapy," the friend said.

Meanwhile, Leah denied that she has a new guy in her life after Corey accused her of confusing their 5-year-old twin girls, Ali and Aleeah, in the process. "I'm not dating anybody," she said, according to Us Weekly. "We were at a cookout with a guy. He does not live with me," Leah added, in reference to T.R. Dues, the guys she is supposedly dating after breaking up with Jeremy Calvert.

Corey interjected that their twins have been telling their dad that mom's new boyfriend is living with them, but Leah is standing by the fact that he's "just a friend." However, The Ashleys Reality Roundup said that while this episode was being filmed back in July, T.R. was there to accompany Leah.