Use your words, Katie! Things get a little heated -- literally -- between Katie Yeager and Joey Maes during the 12th episode of MTV's Teen Mom 3, airing Monday, Nov. 4.

As seen in this exclusive clip from the show, the episode finds Katie suffering through yet another fight with her on-again, off-again boyfriend Joey, the father of her 2-year-old daughter, Molli. Mid-argument, the MTV star becomes consumed by anger and hurls a cup of what Joey claims is "hot coffee" all over her ex's jeans.

"It's not f--king hot coffee. It's been in here for f--king days," she says when he accuses her of almost dousing Molli in the liquid. "And it didn't even get on her."

Hot or not, the coffee is the least of Katie's problems with her daughter's dad. "It's really funny how little you care about me," she tells her ex-fiance. Later, breaking down in tears, she sobs, "Whether I want you to or not, you're going to be in my life forever."

Watch Katie's breakdown above, and tune in to Teen Mom 3 on Monday, Nov. 4, at 10 p.m. ET on MTV.