It often seems that Jenelle Evans and Kailyn Lowry have been feuding forever, but the bad blood between these co-stars is actually a relatively new development.
They were never exactly besties, but it seems Kail only realized that Jenelle is bad news in early 2015 -- around the same time that many Teen Mom 2 viewers realized that Jenelle is a lost cause with no desire to reform.
You see, Evans is no victim of circumstance and deserves no sympathy.
She's not a troubled young woman trying to make her way in the world; she's an agent of chaos seeking to drag others down to her level.
And lately, she's been attacking Kail in an effort to distract from much more serious issues in her life.
There was a time when Kail put real effort into forming a friendship with Jenelle, but eventually, she came to the realization that Jenelle is beyond help.
A True Friend
At one point, Kailyn even helped to bail Jenelle out of jail. Presumably, this was before she realized that Jenelle has no intention of changing her ways and will continue to get locked up until they eventually throw away the key.
The friendship between the co-stars deteriorated gradually, but the point of no return seemed to be when Jenelle told the world Kail was pregnant with her third child.
Cold War Turned Hot
At the time, Lowry was not ready to go public with that news, and ever since, she and Jenelle have not minced words when discussing one another publicly.
After that, it was a no holds barred throwdown between these two, and a pattern quickly emerged.
When Jenelle gets bored or needs something to distract from her increasingly dysfunctional personal life, she simply lobs a social media grenade at Jenelle. Last week, we saw a prime example of this phenomenon ...
Seemingly out of nowhere, Jenelle attacked Kail for posting about her on social media.
Out of the Blue
The tirade left fans baffled, as all of the stars of the Teen Mom franchise comment on one another's personal lives, and it's never been a problem before.
Double Standard Much?
And many of the same articles that were posted by Kail were also posted by Brians DeJesus -- who escaped Jenelle's wrath entirely.
"I really hope you're reconnecting with your mom because you f—ing need it," Evans' rant continued.
"You need someone to love you so you can stop fantasizing about other's lives and putting others down because you don't have the life you want," Jenelle added. "Sorry. Hope you find some peace and happiness."
Like everyone else in Jenelle's life, Kail is used to her former friend's unhinged cruelty at this point, and as a result, she handled the situation with admirable equanimity.
"I'm flattered she's so bothered by me," Lowry joked when discussing the situation with Radar Online in a recent interview.
"She's gotta calm down," Kail continued. "Out of everyone she's only bothered by me... and I'm not even writing about her."
"Jenelle only makes a big deal about me when something else is going on underneath it all," Lowry added.
Indeed, it does seem that Jenelle is trying to shift the public's focus away from recent events in her personal life.
Under the Knife
In the past week, Jenelle has posted and deleted a number of updates about her recent "emergency sinus surgery" and many fans believe she's not being honest about her reasons for being hospitalized.
Some are under the impression Jenelle underwent a low-key cosmetic procedure, but many more believe that she's a victim of domestic violence and is helping to cover for her husband.
An Odd Situation
Whatever the case, most who have commented on the situation -- such as Briana -- appear to be exempt from Jenelle's wrath, while Kailyn is still held responsible for every comment she makes. It's enough to leave one with the impression that Jenelle has something to hide ...