As Leah wrote, “at the time, there were only a handful of adults around the world with the same type of muscular dystrophy, and Ali was the first child ever to be diagnosed. With adults, they know that Titin MD can lead to heart and lung failure, but for Ali, we have no idea what to expect as she gets older because she is the research.”

Although Ali and her family are dealing with a challenging diagnosis, it’s clear that the 10-year-old hasn’t let it stop her from living life to the fullest. Leah regularly posts pictures of all three girls apparently having a blast together — and looking adorable the whole time, obviously.

“If you are ever wondering where I find my hope and determination, it is in this girl!” Leah wrote in the caption of a recent Instagram post featuring Ali doing some gymnastics. “Ali’s hope and determination through all circumstances will always inspire me. I'm so blessed to be her momma.” So sweet!

You can catch up with Leah and her daughters — as well as all of the other Teen Mom 2 stars and their respective children — on Season 10 of the show, which airs Tuesdays at 8 p.m. ET on MTV.