As hard as Bruce Jenner’s transition from male to female has been for the former Olympian, it’s also been a big challenge and adjustment for his famous family. In a new sneak peek clip from the two-part Keeping Up With the Kardashians special, About Bruce, Kendall Jenner breaks down crying and goes to grab a tissue. 

“He’s the most amazing person I know,” the supermodel, 19, says through tears. “I couldn’t ask for a better dad.”

As home video footage rolled of Bruce and Kris Jenner with their kids, Kendall adds, “He taught me how to ride a bike and be the tomboy that I am. Every single day we went to school 45 minutes away from home, he would drive us to school, he’d be the first one in line to pick us up.”

The special, which will feature Bruce talking to each one of the five Kardashian-Jenner girls, airs Sunday, May 17 and Monday, May 18. In late April, Jenner spoke with Diane Sawyer about his gender transition, saying, “For all intents and purposes, I am a woman.”