Our jaws hit the floor during this week's episode of Teen Mom 2 when Jo Rivera angrily told his baby mama, Kailyn Lowry, that he hoped her "f—ing water breaks." Fortunately, Kailyn didn't hear the comment when he made it, but she was just as shocked as we were when the episode aired. What was Jo thinking?!

"All I have to say is I had NO IDEA Jo said that," Kailyn tweeted during the show. "What an awful thing to wish. I hope he isn't teaching our son such hate."

Jo's comments were definitely said in the heat of the moment, but there's really no excuse for saying something so mean. If Kailyn's water were to break that night, her baby would have been born prematurely — which would have lead to lots of potential health problems. We're sure Jo didn't really mean what he said, but still … so many side-eyes!

"That comment was actually very disgusting for Jo to have made," Kailyn continued. "Who says something like that? No matter how mad you are..."

Hopefully, Jo reached out to Kailyn and apologized for what he said. As far as we know, these two are in a pretty good place right now, so here's to hoping they'll get past this awkward moment! Oh, and by the way, Kailyn's water didn't break early… she gave birth to her son, Lincoln Marshall Marroquin, right on time!

Are you shocked by Jo's mean remarks? Weigh in below.