Things between Kailyn Lowry and Jo Rivera are off to a bad start in Season 4 of Teen Mom 2 (Kailyn just filed a Protection From Abuse order against him after a physical altercation!), but that footage is over a year old. Nowadays, Kailyn and Jo are co-parenting baby Isaac better than ever, and they're even starting to seem like — dare we say it? — friends.

In a recent text message exchange, which Kailyn posted to Instagram on March 1, the Teen Mom 2 stars engaged in some LOL-worthy banter.

"Guess what this stuff is called," Jo sent his baby mama with a picture of a green leafy vegetable. "Kale," she replied, to which he responded — are you ready for the kicker? — "Yea kale, Kail."

Wow. Now we know why he calls himself Nerd in a Cool Kid's Body! Who knew this wayward rapper was so well-versed in botany and homophones?!

All joking aside, Jo and Kailyn have really come a long way since they first graced our TV screens in Season 2 of 16 and Pregnant. It's been a rough road for the young parents, and we're looking forward to seeing their relationship continue to blossom like a beautiful kale plant as Teen Mom 2 continues.

Are you surprised to see Jo and Kail getting along so well? And more importantly, do you think it'll last? Tell us below!