Leah Remini and Sofia Pagán

Leah Remini has proven time and time again on her TLC reality show that she'll do whatever it takes to be a great mom. But does that include conquering one of her lifelong fears?

In this exclusive sneak peek from Thursday's season finale of Leah Remini: It's All Relative, the actress attempts to go zip-lining while on vacation in order to overcome her fear of heights for her daughter.

The hottest celebrity beach bodies

"My daughter's there and I want to show her that I'm not afraid," Remini tells the cameras. So did she actually do it?

Check out the exclusive video to find out:

Leah Remini: It's All Relative airs Thursdays at 10/9c on TLC.