If you watched last night's episode of Teen Mom: OG, then you were probably struck by the unexpectedly moving scene in which Maci Bookout opened up about her ongoing problems with her baby daddy, Ryan Edwards.
Ryan and Maci's problems aren't of the usual variety experienced by co-parenting exes.
In fact, they seem to get along surprisingly well, especially by the rather low standards of relationship functionality set by the rest of the Teen Mom cast.
But that doesn't mean that Ryan and Maci's problems aren't very real - and very frightening.
These days, Maci's main concern is Ryan's drug use, and she opened up about the issue in surprisingly candid fashion while vacationing in Puerto Rico with Catelynn Lowell and Amber Portwood.
(Farrah Abraham wasn't invited because, well, she's Farrah Abraham.)
“What I’m saying is that everyone else around him is too afraid of what it will look like more than his health,” Maci told her co-stars at one point.
She went on to reveal that she believes those closest to Ryan - including his parents and fiancee - are guilty or enabling his self-destructive behavior by ignoring the problem.
Interestingly, Maci never openly stated that Ryan is on drugs, but the implication was clear.
Maci's concern seems genuine, but not surprisingly, those in Edwards' inner circle aren't thrilled with her finger-pointing.
Ryan got engaged to Mackenzie Standifer last year, and while it's still unclear how large of a role Mackenzie will play on the show going forward, she's already making her presence known in a big way.
Already, Standifer has complained about MTV's editing practices in lengthy social media rants, and it seems she was similarly irate last night's episode.
This time, however, Mackenzie's beef wasn't with MTV, but with Maci.
Asked on Twitter if she's "ready to spend the rest of [her] life wondering if [Ryan] is high?” Standifer responded, “Well I am ready to spend the rest of my life not worrying about ignorant comments.”
Now, to be fair, the "ignorant" remark might have been directed at the tweeting fan, and not at Maci.
But that didn't stop a whole lot of fans from interpreting the tweet as shade thrown squarely in the direction of Ms. Bookout.
Looks like we could have a new feud in the making, which is surprising given Maci's recent aversion to drama.
Watch Teen Mom online to relive her wild relationship with Ryan.