Kailyn Lowry's Ex Husband Javi Marroquin's Tell-All Book To Slam Pregnant 'Teen Mom 2' Star

Javi Marroquin plans to slam his ex-wife Kailyn Lowry in his new tell-all book despite ending their nasty divorce battle, Radar Online reported late Sunday.

“I’ve been working on this book for a while,” Marroquin told Radar Online. “Regardless of what’s in my book Kail knows it’s behind us and my story won’t change.”

Marroquin's book "Heartlessly Hustled is reportedly a response to Lowry’s book "Hustle & Heart," in which the "Teen Mom 2" star criticized her ex-husband for being jealous and having control issues.

Read: Kailyn Lowry's Paternity Scandal Continues

“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,” Lowry penned in her book. “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.”

Recently, things heated up between Marroquin and Lowry after the latter announced that the father of her third child is Chris Lopez. While Marroquin had earlier rejected rumors of being the father of her third child, he was concerned that the legal responsibility of Lowry's new baby could fall on him if Lowry does not name Lopez as the baby daddy in birth documents.

Last week, Marroquin said he was planning to take legal action against Lowry as he does not want any responsibility of Lowry's third child.

“I’m doing what I have to in case she doesn’t put him on [the birth certificate],” Marroquin, 24, said of Chris Lopez to Radar Online. “I’m talking to my attorney right now.” Marroquin, who shares son Lincoln, 3, with Lowry, added: “I’m not worried about it!”

As the celebrity gossip website had earlier reported, citing New York Attorney Brooke A. Camhi that Delaware law states “the ex-husband is presumed the father of a child if the child is born less than 300 days after the divorce.”

While Marroquin has maintained a relationship with Lowry’s son Isaac, 7, whom she had with ex-boyfriend Jo Rivera, he told Radar Online earlier this month he “won’t have a relationship with the new baby.”

Earlier this month, Marroquin also slammed the pregnant MTV reality star for posting pictures of her with another man, just days after revealing that Lopez was the father of her third child.

“It’s just sad. It makes me sad for the boys. I have nothing else to say about her,” he told Radar Online in an exclusive interview. Just after Lowry had posted the pictures on social media, Marroquin wrote on his Twitter, “I’m disgusted.”

In another tweet, he wrote:“Something is flying in the air...might come back... nah don't do it, Jav.”

Lowry gained a lot of social media attention since the time she announced her third pregnancy in February but decided to keep the identity of baby daddy no. 3 a secret. Many speculated Tyler Hill, JC Cueva, or Lopez of being the father until Lowry made the revelation earlier this month.