Teen Mom 2's Javi Marroquin Slams Ex-Wife Kailyn Lowry in Twitter Rant: 'Someone's Bitter'

Javi Marroquin may have moved on to fellow Teen Mom 2 star Briana DeJesus, but he isn’t done taking jabs at ex-wife Kailyn Lowry.

As Friday night’s episode of Marriage Boot Camp: Reality Stars aired, the former couple reacted to what was happening onscreen via Twitter — and things got heated.

The episode focused on Marroquin and Lowry’s battle over child support — they share 4-year-old son Lincoln — and the latter tweeted, “Wow, disappointed in yourself that you let OTHERS influence how you treat the mother of your child, yet here we are again.”

Shortly after, Marroquin took to his own social media page to respond.

“Someone’s bitter and can’t move on from s— that happened almost 2 years ago,” he wrote, adding the hashtags “#yesterdayspaper,” “#MarriageBootCamp” and “#moveon.”

The 24-year-old then added, “Have more important things to worry about right now than a past relationship that’s dead to me. Lincoln is the only thing keeping it alive. Which I’m blessed for don’t get me wrong. But him, that’s it.”

When Marriage Bootcamp‘s Judge Lynn Toler tweeted out, “If the woman holding up your kids isn’t ok your kids aren’t either …,” Marroquin was quick to reply.

“Can’t be one-sided,” he said. “There are dads out there that step up more than a mom. Can’t be biased.”

But even though Marroquin is dating his ex-wife’s costar, which he told PEOPLE in October, things seemed to be fine between him and Lowry before Friday’s Twitter rant.

In an Instagram post in mid-October, Marroquin shared a sweet post of himself kissing his ex on the cheek. “Despite everything that happened between us I’m happy we are at a place where we can go to events..have a good time and be civil,” he wrote. “We’re doing a pretty good job raising these kids ]]>🙌🏻