They were doing so well! Exes Kailyn Lowry and Javi Marroquin have come along way since their extremely messy divorce was finalized last December — they were even able to reunite a few times in order to co-parent in a healthy way. But Kailyn threw some major shade at her ex-husband during this week’s episode of Teen Mom 2 and he was not having it — shortly after the episode aired, he took to Twitter to clap back.

“Old me would’ve given you the reaction you want, but I’m good,” the 24-year-old wrote, adding the man shrugging emoji. Even though he didn’t directly mention Kail in his tweet, it was pretty clear that he was talking about his ex-wife.

MORE: Kailyn Lowry Was Told She Couldn’t Have More Children Before Conceiving Baby No. 3

View this post on Instagram

Happy 4th from us to you!

A post shared by Javi Marroquin (@javim9) on

Fans are convinced that his shade was directed at Kail, and many of them replied with words of encouragement. “Just focus on your happiness now. She’s not worth the effort or time. You have happiness and she has more drama on the way,” one fan wrote. Another fan offered the Airman advice, ” That was also [six months] ago. If you’ve made progress with [Kail] since then, don’t revert back because of reactions to old sh–.”

During the episode, Kail finally opened up about her third pregnancy despite her desire to keep it — and the identity of her baby daddy — a secret. Kail said that she didn’t want the public to know that she was expecting baby number three with her ex-boyfriend Chris Lopez becuase she saw how much backlash her fellow Teen Mom 2 star Jenelle Evans got when she announced that she was having her third child with her third baby daddy.

MORE: Javi Marroquin Gushes Over His New Girlfriend — Says He’s “Never Been Happier”

But Kail opened up to her ex Jo Rivera — who is the father of her seven-year-old son Isaac — and she said that she didn’t want him or anyone to tell Javi because she was worried that he would sell the story to the media because he is “unstable.”

Love Teen Mom? Be sure to join our Teen Mom Facebook group to chat about all the latest updates and juicy gossip!

Scroll through the gallery below to find out what the dads of the Teen Mom franchise do for a living!