Watch Kourtney Kardashian Hide Her Disappointment When Khloe Picks Kim to Be True's Legal Guardian

Khloe Kardashian seems to be pretty confident her sister Kim would make a better legal guardian for daughter True than Kourtney in a preview of this Sunday's "Keeping Up with the Kardashians."

Khloe has both sisters over to her house to tell them her decision, and the look on Kourtney's face tells us all we need to know.

"I mean, I'm a little bit disappointed that I'm not the guardian," Kourtney says in a confessional. "But honestly you don't know what your parenting style is until you have kids. I think once Khloe has her own daughter and she's really a mom she will realize we have more in common than she thinks in terms of parenting styles. You never know, Khloe might switch back to me."

Kim, meanwhile, is beaming as Khloe spills the complimentary news.

"So I can't make anything official until the baby is born, but I am going to probably have Kim as the legal guardian if, god forbid, something happens," Khloe says. "I don't know my parenting style until I have a baby, but from what I envision my parenting style to be, I do think it'll be more like Kim. A little more stricter."

She further explains, "Watching Kimberly be a mom, I really respect her parenting skills. Not that I don't respect Kourtney's, I relate to how Kim parents more."

Kim is honored to accept the responsibility in the event that something awful would happen to Khloe and her baby's daddy Tristan Thompson, and Kourtney says she's relieved.

"Guess what? You don't have to give me an explanation," she tells her pregnant sister. "I've got three kids, and I'm busy on my own."

"Keeping Up with the Kardashians" airs Sunday at 9 p.m. on E!