Javi Marroquin and Briana DeJesus are heating up but according to a new report, Marroquin's ex-wife, Kailyn Lowry, doesn't believe the new romance is genuine.

According to a new report, the Teen Mom 2 star and mother of three is convinced that her ex-husband, the father of her 3-year-old son Lincoln, is only dating their co-star, who is mom to two daughters from previous relationships, to get back at her for their split.

“Kailyn [Lowry] can’t help thinking that Javi [Marroquin]‘s main reason for dating Brianna [DeJesus] is to spite her," a source told Hollywood Life.

The insider said that in addition to choosing to hook up with one of their Teen Mom 2 co-stars, which he reportedly knew would garner him tons of publicity, he's also chosen to date the Teen Mom 2 star that lives over a thousand miles away.

"It’s not even like it’s convenient," she said.

Marroquin and DeJesus have been in contact with one another for the past several months but they didn't go public with their relationship. Weeks ago, they enjoyed a number of vacations including a visit to Disney World with their children, including Marroquin's step-son, 7-year-old Isaac.

During their trip, and during the trips Marroquin and DeJesus have taken since, the couple hasn't hesitated to share photos and videos of their time together on their social media pages.

"Each time she has to look at photos of the two of them together, or see yet another story about them dating, it’s like a stab in the heart, and it’s driving her crazy," the source continued. "It must have crossed Javi’s mind that getting with Brianna would piss off Kailyn."

Lowry and Marroquin were married for three-and-a-half years before announcing plans for divorce in May 2016.

To see more of Kailyn Lowry, Javi Marroquin, their family, and their co-stars, including Jenelle Evans, Briana DeJesus, Chelsea Houska, and Leah Messer, don't miss new episodes of Teen Mom 2 season eight on Monday nights at 9 p.m. on MTV. Tune into season nine of Marriage Boot Camp: Reality Stars on Fridays at 9 p.m. on WEtv.

In the coming months, Javi Marroquin is expected to star in his own series, Being Javi, on MTV. No word yet on whether or not Briana DeJesus will be featured.