In a sneak peak of Keeping Up With The Kardashians, an emotional Kendall admits that she struggled to let go of her dad, Bruce Jenner.

The 19-year-old supermodel disclosed to her step sister Khloe Kardashian, that the reason she had put off visiting her father - who is now known as Caitlyn Jenner, after undergoing a gender transition - because it would mean accepting "he" had gone.

As seen in the trailer, Khloe asked Kendall: "How are you dealing with everything?" In which Kendall replies: "I'm alright. I feel like it's a process. It's something to get used to for sure. But the only thing is I haven't met her. It's also a letting go thing. It's like when you officially meet her it's like he's gone. I think that's what I'm holding on to. That's why I've taken so long to meet her."

This is not the first time where Kendall showed her real emotions about her dad's transition. As she mentions in her the video that was uploaded in US Magazine, "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."

In her recent interview with Women's Daily Wear, Kendall revealed how Caitlyn didn't mind to still be called "dad" in spite of the former Olympian's transition as he comes out as a transgender earlier this year.

As she explains in the interview, "It's an adjustment. It's something you have to get used to. But I've known since I was a kid. He never confirmed it to me, but I've known for a very long time. It's the same person. My dad says it herself sometimes, it's kind of like mourning the loss of someone, because it is."

"My dad is my dad, but he's not there physically anymore. But she lets me call her dad - that's the last little piece of dad I've got."

The full episode airs this Sunday.