Estranged "Teen Mom 2" couple Kailyn Lowry and Javi Marroquin is back to work. It will be for the upcoming season of "Marriage Boot Camp: Reality Stars." The couple expected to reconcile on the camp did not seem to make it.

The mother-of-two released her book, "Hustle and Heart" where she opened up the reasons why her marriage failed. She confessed, "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 also wrote, "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."

According to the Inquisitr, the book also contains her rape experience at a young age. The book is the very first honest, bare-it-all account of her life.

According to In Touch Weekly, the Air Force member and the "Teen Mom 2" star accused each other of cheating. The accusations pulled the trigger that killed their marriage.

The ill-fated union bore a son, Lincoln, 3. It left another son, Isaac from her relationship with Jo Rivera sad of losing a dad again. The couple is now co-parenting their kids.

In fact, they were a family again recently at the celebration of the boy's 3^rd birthday. Both of them have adjusted to their current set up and are civil and supportive of each other.

Javi Marroquin even supported her book. He posted on his Instagram a snap of him holding the book. The caption says that he hates her but he is proud of her.

Kailyn Lowry is reportedly in a new relationship. She posted a photo of a bouquet of flowers from a mystery man. A reunion with the daddy of her son seems remote at present. The good thing is the "Teen Mom 2" star and her ex-husband is rearing their son in the best way they can.