'Teen Mom 2' Leah Messer Husband Jeremy Calvert Has Proof His MTV Wife Cheated With Ex Robbie Kidd! We Have The Shocking Details!

Teen Mom 2 star Leah Messer's marriage to Jeremy Calvert is all but over after ex-boyfriend Robbie Kidd finally admitted they slept together behind Jeremy's back. However, the MTV dad didn't need Robbie's confession to be certain his wife deceived him.

"Jeremy has proof she cheated," a source told Radar Online. "He regrets lashing out on Twitter about it, but he wouldn't have done that if he hadn't known for sure."

The reality couple is on the verge of divorce and the evidence Jeremy has will be useful to him in court when that day arrives.

"He wants to show people the truth, but everyone is telling him to lay low right now," the source said.

This comes on the heels of Leah's "other man" Robbie's shocking tell-all to In Touch Weekly, where he acknowledged the two had sex while her marriage was crumbling.

"That day, around noon, I asked her if she wanted to come over and talk," he said. "Leah didn't hesitate. She came right over, and one thing led to another and we had sex. We wore protection. That was the one and only time."

"Afterward, she said, 'Oh, what did we do?'" he continued. "Whenever things are going bad in our lives, we reach out to each other, and this is what happens."

According to her side piece, this was only a one-time thing that will never happen again.

"We'll always have a connection, but I'm tired of the drama," he told the mag. "I'm finally happy with where I'm at in my life. I don't want anything to do with her anymore."

Leah hasn't been the only one engaging in extracurricular activities. Jeremy was caught texting sexy messages to a young blonde beauty from West Virginia named Brittany Musick, whom he met on Twitter.

"Do I need to get a room or r u staying the night," Jeremy asked.

"Yea I prob would have to stay the night since I'm already getting there lil late," she replied.

What proof do you think Jeremy has on Leah to use in their divorce?