Teen Mom 2 fans have watched Leah Messer face just about every challenge a mother can endure over the course of the eight years.
But perhaps nothing has brought the long-suffering mother of three more strife than the health issues suffered by her daughter Ali.
Ali was diagnosed with muscular dystrophy shortly after birth, and while her parents have consistently sought the best treatment available, there"s no guarantee that her condition won"t deteriorate with age.
This ongoing battle was the focus of Messer"s storyline on Monday"s episode of TM2, and fans were deeply moved by Leah and her ex-husband"s efforts to set aside their differences in order to do what"s best for their beloved daughter.