Kailyn and Jo have matured enough over the years to contain their disdain for one another in front of their son, Isaac, but the exes still struggle with remaining civil when it's just the two of them around. The "Teen Mom 2" sneak peek below begins with possibly one of the sweetest scenes in the history of the show -- Jo high-fives his son for making "a poop in the potty" -- but the tone quickly changes when Isaac scuttles off, and his doting parents are left to argue over drop-off time.
"Why are you so late?" Jo asks, clearly irritated, which immediately puts Kail on the defensive. "I wasn't the one that was late! We were both late," she retorts. What follows is a pointless back-and-forth that concludes with a vicious dig from Jo: "I hope your fu**ing water breaks tonight," he mumbles. Let this be a lesson to any teens in a rush to marry their high school sweetheart.
Check out the clip, and remember to tune in to a new episode of "Teen Mom 2" this Tuesday at 10/9c.