"Every time an issue comes up, it's like Nathan is never my teammate," Evans says in an exclusive sneak peek at Thursday's episode of Teen Mom 2.
"If this is turning into an argument, then I'm walking away," responds Griffith during their discussion about the ongoing custody battle concerning Evans' 6-year-old son Jace that the 23-year-old has been fighting for years with her mom Barbara.
But the custody battle isn't the only issue that caused friction between the former fiancés – shortly after Griffith popped the question to Evans in January, it seemed there was already trouble in paradise for the couple who are parents to son Kaiser, 1.
Griffith snapped at Evans in the July 23 episode, pointing his finger at her angrily: "I told you, stop disrespecting me."
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Teen Mom 2 airs Thursdays (10 p.m. ET) on MTV.