Jenelle Evans and Kailyn Lowry have never quite gotten along.
And by that, we mean the Teen Mom 2 co-stars seem to actively hate one other.
The Jenelle-Kailyn feud has been raging for years, and not surprisingly, it's Ms. Evans who typically takes the offensive.
This time, however, it was Kailyn who threw the first shade.
Staying true to form, however, Jenelle responded to her rival's playful jab with a full-scale nuclear assault.
It all took place during the airing of last night's Teen Mom 2 behind the scenes special.
During a scene that took place at Jenelle's wedding to David Eason, Kailyn decided to offer a little color commentary.
"What a sh-t show of a wedding," Kailyn tweeted during the episode.
This comment didn't sit well with Jenelle, with proceeded to go off on Kail:
"At least I didn’t go around telling everyone at the reunion a while back that you wanted divorce Javi to have a 'black baby,' like wow. Classy kail... right to me and my mom’s face lmao why didn’t they show that sh-t show?"
Yes, this is Jenelle's idea of a proportional response:
Oh, you called my sh-t show wedding a sh-t show? How about I publicly drag your entire family and belief system?
To her credit, Kailyn kept it relatively cool.
Instead of flaming Jenelle in return, she simply retweeted a fan who commented:
"Get ready for another c & d."
The comment refers to the cease and desist letters that Jenelle sent her co-stars last year.
Mrs. Evans-Eason is apparently in the habit of taking legal action when she doesn't like what her castmates have to say, and we wouldn't be the slightest bit surprised if Kailyn receives another sternly-worded letter from Jenelle's attorneys.
For her part, Lowry didn't talk any direct trash to Jenelle, and it seems the rest of the special put her in a reflective mood.
"Sitting here watching the behind the scenes shit makes me really think about how weird my life is. And how differently everyone really lives," she tweeted toward the end of the episode.
Yes, Jenelle certainly lives ... differently.
That might be the understatement of the century.
Watch Teen Mom 2 online for more shenanigans from the Carolina Hurricane.