Credit: MTV

In this exclusive sneak peek of tonight's all-new episode of Teen Mom 3, Katie Yeager and her fiancé Joey Maes are still trying to make their relationship work, but unfortunately, things aren't going so well.

Katie calls up Joey on her way to the rec center to let him know that Molli's late for her swim lessons. Joey apologizes for not being home, explaining that he thought she had a ride. But that's not good enough for Katie, who snaps back at Joey with a few F-bombs.

Joey quickly changes the subject and asks if he can go fishing (uh, bad timing, dude) to which Katie responds, "Do whatever the f— you want" and hangs up on her man.

Will these two ever be able to work things out?! Tune in to Teen Mom 3 tonight, Monday, October 7 at 10 p.m. ET on MTV to find out.