Teen Mom Conspiracy? Leah Claims Ex Corey CHEATED His Way To Custody Of Their Daughters

Leah Messer may have lost primary custody of her twin daughters after months of poor parenting accusations, but she doesn't think she's to blame for the judge's dramatic decision.

Instead, the Teen Mom 2 star, 23, believes her ex-husband, Corey Simms, and his wife Miranda Patterson lied and cheated their way to victory in the nasty court battle, sources exclusively tell RadarOnline.com.

Friends say she's even certain the couple convinced 5-year-old Ali and Aleeah's teachers to mark them tardy or absent when Messer dropped them off for school, making the MTV star look like a bad mom.

"Leah knows that Corey and Miranda are close with the girls' teachers, and thinks they used those friendships to their advantage," a family insider told Radar. "She believes the teachers actually faked records."

Messer expressed her skepticism about the records when she spoke with Us Weekly last month. She told the magazine that Ali had often been marked tardy when Aleeah hadn't, even though she obviously brought them to school together.

There are even rumors around town that Simms, 26, once dated one of the teachers in the West Virginia elementary school.