Catelynn Lowell and Tyler Baltierra were once considered the most stable couple in the Teen Mom franchise.
Now, however, it seems that Baltierras are fully feeling the pressures of married life and parenting.
In fact, promotional materials for this week's episode of Teen Mom: OG hint that Tyler and Catelynn will be brought to the brink of separation.
According to the episode description from MTV, Lowell and Baltierra struggle after returning home following Catelynn's stint in rehab.
We knew about Catelynn receiving treatment for anxiety and depression issues back when she checked into the Arizona facility, but new details about her time away from the family and the issues that led her to rehab are just now emerging.
Apparently, Catelynn's depression was so severe that it often left her unable to get out of bed.
And in addition to her emotional difficulties, Lowell apparently struggled with a "psychological dependency" on pot.
A preview clip for Tuesday's episode reveals that she's still struggling in efforts to quit smoking weed entirely:
When confronted by Baltierra's mom, Lowell doesn't openly admit that she's still smoking, but she doesn't deny it, either.
"It's something I probably won't talk about because I don't want the whole world to know," she says, not so cryptically.
Sadly, now that the show is focusing on her troubles, we're beginning to see the impact that Catelynn's illness and addiction are having on her marriage.
Recent episodes have seen her husband, Tyler, reduced to tears by her struggles.
Now, fans are beginning to wonder if the Baltierras' marriage is as strong as it once seemed.
Even before Catelynn checked into rehab, there were signs of trouble.
The Teen Mom season premiere attracted controversy due to a scene in which Baltierra seemed to fat shame Lowell after the latter revealed that she intended to go on a diet.
In reality, the situation probably isn't as dire as it was some fans on social media are making it out to be.
But even so, Tyler and Catelynn's issues serve as a reminder that marriage and parenthood ain't easy - even for the strongest of couples.
Watch Teen Mom online to relive the Baltierras' ups and downs.