Speaking with PEOPLE about how she’s feeling as she prepares to watch her husband play in Glendale, Arizona — with daughters Elliotte, 23 months, and Wyatt, 3, in tow, while 38 weeks pregnant — Kylie shares that her brother-in-law Travis is the “absolute best” as an uncle to their girls.

“It’s very funny, Jason said in an interview that he thinks [the girls]”I tell everybody, he comes to our house to visit and the poor guy doesn’t sit on the couch because our daughters will be like, ‘No, no, you sit on the floor. We’re gonna do a puzzle. We’re gonna build blocks. We’re gonna do this, we’re gonna do that.’ ”

Kylie says she’s tried to tell Travis that he can turn down his nieces’ many requests.

“Our oldest, she’s our boss. She’s our ring leader, and she just has demand after demand for him. And I’m like, ‘Trav, you know you can tell Wyatt no?’ ”

“He was like ‘Yeah, I don’t think I can.’ And so he will do it,” she tells PEOPLE.

“She’ll be like, ‘Jump up and down.’ He’ll do it. ‘Roll on the floor,’ he’ll do it. ‘Be the pony.’ He’ll do it. So he’s all-in when it comes to being an uncle. He is the epitome of an uncle, just through and through.”