Kailyn Lowry is not holding back when it comes to her split from Javi Marroquin — and the Teen Mom 2 star revealed what REALLY happened between them in her new tell-all, Hustle & Heart.

The mother-of-two blamed her ex's controlling and jealous nature for the demise of their marriage.

kailyn lowry and javi marroquin

"When he did things like demanding that I unlock my phone to prove I had nothing to hide, or calling me constantly when I was enjoying time with friends to make sure I wasn’t doing anything ‘sneaky’ behind his back, it became clearer and clearer how little my husband trusted me,” she recalled.

MORE: Kailyn Lowry's Sons Are All Grown Up — See the Pic

“I had done nothing to make him doubt me. I never lied, never went behind his back and I was never unfaithful. For some reason, he was convinced otherwise.”

kailyn lowry and javi marroquin (getty images)

Kailyn also spoke about a time where she hoped to open her own blowdry bar, but gave up on the idea thanks to Javi's lack of support.

Both parties were hit with cheating allegations after they confirmed their breakup in May, and Javi also recently claimed his ex's decision to go under the knife "changed her."

Relive Kailyn and Javi's cutest moments in the gallery!