Kourtney Kardashian "disappointed" after Khloe chose Kim as legal guardian of his daughter

Khloe Kardashian has made an important decision.

In short, the Sunday episode of The amazing Kardashian familyKhloe – at the time pregnant with her first child, Baby True – decided that her sister Kim would become the guardian of her daughter. The only ride? Then she has to announce the news to Kourtney.

"So I can not make anything official before the birth of the baby, but I will probably have Kim as legal guardian if, God forbid, something happens," says Khloé, 34, in the music video posted by E! New. "Just because I do not know my parenting style before having a baby, but from what I imagine to be my parenting style, I think it will look more like Kim – a lot stricter. . "

Kim, 37, and Kourtney, 39, have three children. Kourtney shares his sons Mason, age 8, Reign, age 3, and daughter Penelope, age 6, with ex Scott Disick, and Kim shares daughters North, age 5, Chicago, age 7, and son Saint, age 2, with son husband Kanye West.

"Watching Kimberly being a mom, I really respect her parenting skills – not that I do not respect Kourtney, I relate to how Kim's parents more," Khloé says. "But at the end of the day, this family is so close and we love each other so if anything happened, I know my daughter is in good hands, no matter what her legal guardian is. "

"Guess what, you do not have to give me an explanation," Kourtney replies, "I have three kids and I'm busy with myself."

"You are at full capacity," suggests Khloe.

"No, I do not have the capacity," says Kourtney, adding that she would like to have "more" other children.

Kim, meanwhile, claims that Khloe's decision is "an honor" and promises that she would "take good care" of her future nieces and nephews.

As for Kourtney?

"I'm a little disappointed not to be the tutor, but honestly, you do not know what your parenting style is before you have children," she says. "So, I think that once Khloe has her own daughter and she's really going to be mom, then maybe she'll realize we have more in common than she thinks it is for parenting styles. We never know! Khloe could come back to me.

ASSOCIATED VIDEO: Kourtney Kardashian says she's "ashamed" of her "disgusting" family

Khloe, who hosted True with her boyfriend Tristan Thompson on April 12, recently told PEOPLE that she most relied on Kim when it came to advising Mom.

"I must say that Kim has probably given the best advice because she has no judgment on it," she said. "She offers different ideas and either you take it, or you leave it, and it's okay."

Keep in touch with the Kardashians tunes on Sundays (9 pm ET) on E!