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At one point, they were rumored to be friends.

When Briana DeJesus joined the cast of Teen Mom 2 for the show’s most recent season, Kailyn Lowry seemed to be the only veteran cast member who didn’t have a problem with it.

That all changed when Briana began dating Javi Marroquin, Kailyn’s ex-husband and the father of her second child.

These days, Bri and Kail are bitter enemies, and it seems there’s no end to their feud in sight.

Check out our rundown of the latest shots fired in this increasingly brutal war or words: