While Jenelle Evans' abortion made the majority of the headlines Monday night, her MTV co-star dropped an equally shocking (albeit very different) bombshell.
Teen Mom 2's Leah Messer Calvert ended the Season 5 premiere with the news that her 4-year-old girl Aliannah has a rare form of muscular dystrophy.
Fans know that Leah and her former husband Corey Simms have spent years seeking answers as to why Aliannah was so developmentally delayed.
Now she finally has them, but that doesn't make it any easier to take.
Ali's condition is degenerative, according to experts, and will likely worsen as the preschooler gets older, eventually confining the poor thing to a wheelchair.
Fortunately, Ali is happy and content at present, but still. Life has dealt Leah A LOT in recent years, and it's hard not to feel for her deeply after this.
Aliannah and Aleeah are Leah's twins with Corey Simms, whom she married and divorced months later in a saga that played out at length on Teen Mom 2.
The two had their problems as a married couple, and were never the best communicators. Yet they remain a strong, united front when it comes to their daughters.
Leah has since remarried and has a daughter, Adalynn, with Jeremy Calvert. She miscarried the couple's first child prior to Adalynn, who she carried to term.
How do you think Leah Messer Calvert will handle the medical revelation regarding Ali? Only time will tell, but it won't be easy, and we wish her only the best.
1. Amber Portwood-Gary Shirley Fight
Amber Portwood and Gary Shirley FIGHT on MTV's Teen Mom. It's one for the ages right here.
2. Farrah Abraham Sex Tape
Farrah Abraham, star of the original Teen Mom, went on to star in a porn video called Backdoor Teen Mom, which she tried to pass off as a "leaked" sex tape.
3. Jenelle Evans Beats Up Girl, Gets Arrested
Teen Mom 2's Jenelle Evans beat the crap out of Brittany Truett a few years ago in one of the more graphic fight videos we've ever seen.
4. Farrah Abraham on Dr. Phil
Farrah Abraham gets put in her place by Dr. Phil. You gotta watch this interview clip.
5. Jenelle Evans Fights Roommate
Jenelle Evans fights her roommate in an epic scene from Teen Mom 2.
6. Kailyn Lowry Fight
Domestic violence is not just for Amber Portwood. Kailyn Lowry gets into a fight with now husband Javi on Teen Mom 2.
7. Teen Mom 2 Commercial: Barbara Raps!
Jenelle's mom Barbara actually sort of raps in this awesome ad for Teen Mom 2.
8. Teen Mom 3 Trailer
There was a Teen Mom 3 for one season. Then it was canceled, but here's a look at some of the drama those girls faced.
9. Teen Mom 2 Trailer: Season 5
Teen Mom 2 Season 5 begins January 21 on MTV. Here's a look at some of what you can expect.
10. Leah Messer's Miscarriage
Leah Messer suffered a miscarriage before getting pregnant again with new husband Jeremy Calvert.
11. Leah Messer-Corey Simms Split
Leah Messer and Corey Simms shockingly broke up after a wedding and two daughters together.
12. Catelynn Lowell and Tyler Baltierra (In General)
Catelynn Lowell and Tyler Baltierra are step-siblings and parents and lovers. That alone is pretty insane, but they make it work.
Kieffer Delp romanced Jenelle Evans for a time and contributed to some of her more epic meltdowns.
14. Amber Portwood in Jail
Amber Portwood did time for drug charges. HARD time. She was locked up for about a year and a half.