From the moment the world first learned that Kailyn Lowry was pregnant with her third child, there's been a great deal of curiosity about her latest baby daddy, Chris Lopez.
At first, it was reported that Lopez wanted nothing to do with Lowry's baby.
In fact, he seemed to have little interest in Lowry herself or the show that made her famous.
He refused to film scenes for Teen Mom 2, and it looked as though his involvement in Lux's life would be limited to writing a monthly check.
But a lot has changed since those days.
Now, Chris plays an active role in his son's life, and he occasionally appears on camera -- which is great news for fans of petty drama, not such great news for Kail.
Take a look:
The relationship between Kail and Chris is often tense, but the parents are occasionally able to set aside their differences for the sake of baby Lux.
Making It Work?
Kail kicked off her segment on Monday night's Teen Mom 2 by revealing that she Chris are "trying to work things out."
Better Luck Next Time?
Unfortunately, that doesn't seem to be going well, and Kail admitted that "things are going downhill."
The episode finds Kail preparing for Lincoln's birthday, and as she explains to her friend, she expects Chris to bail on the shindig.
It seems Lopez had recently sent Kail a romantic text ... that was intended for his ex-girlfriend.
Keepin' It Moving
Despite the betrayal, Kail says she will NOT uninvite Chris, and will instead "keep it moving" for her son.