Dating both twins
Messer is in the process of rebuilding her life after struggling with addiction and unspecified "emotional issues" that have plagued her.
Given that, and after two divorces, learning that her other eldest daughter is also suffering from MD would be a tremendous blow.
Despite the flak that Leah has taken for some of her more questionable parenting practices over the years, most fans are firmly in her corner. Even during her darkest times, the West Virginia native has been relatable and sympathetic, as she wears her heart on her sleeve.
Moreover, she really tries her best to make a difficult situation work, and has made tremendous strides in the last 18 months or so.
Fortunately, there's reason to be optimistic, and while the episode will no doubt be fraught with tension, we aren't assuming the worst.
This is not always the case, however, and certainly some people of single birth may have exceptionally close relationships with siblings.
Rarely have the stakes been so high as this, though, and we'll be very interested to see if there are similar allegations made by Leah. As always, you can watch Teen Mom 2 online to get caught up before what's sure to be a highly emotional installment.
Dating a twin may be similar or not so similar to dating a person who was a single birth child.
Now, the reality show that made her famous has always trafficked in drama - something she and her ex Jeremy can agree on.
Both have criticized the show and its producers publicly for skewing the timeline of events or otherwise altering them to stir up controversy. If this ends well, everyone will breathe a sigh of relief.