We've known for years that Kailyn Lowry and Jenelle Evans aren't exactly besties.
But lately, their mutual dislike for one another has escalated to the level of an all-out war.
Earlier this week, Lowry blasted Evans on Twitter, calling her co-star out for much of the scandalous behavior that's made Jenelle so unpopular with fans.
She also revealed that Jenelle had blocked her, which led many to believe that was the end of the feud.
Of course, we should have known better ...
Jenelle can't resist talking trash, and today she fired more shots at Kail -- and was swiftly put in her place.
Jump into the gallery below for one of the ugliest Teen Mom exchanges to date:
1. Back At It
Jenelle and Kail have been at one another's throats lately, and many now believe Evans is badly outmatched in this battle of wits.
2. The Podmother
It seems Jenelle has taken issue with the fact that she's occasionally a topic of conversation on Kail's Coffee Convos podcast.
3. Jenelle Goes Off
"Soooo it’s OK to constantly talk about me on their podcast tho? Don’t you have any other topics than me?!" Evans tweeted this week.
4. Just Don't Listen?
When fans pointed out that it's actually quite easy to avoid a podcast that one doesn't care to listen to, Jenelle argued that the problem goes beyond Coffee Convos.
5. Talking Smack
"Nah, articles are always written talking s--t about me," Jenelle tweeted, adding of Kail: "Don’t blame her though... she’s just always trying to remain relevant."
6. The Coward's Way Out
It was then that we learned Jenelle was hurling insults at someone she had blocked. It looked like kail would have the final word with this tweet, but today, Evans fired back ...