Khloe said everything from finding out about her pregnancy to revealing the news to her family and friends was documented for their E! reality series, "Keeping Up With the Kardashians."
"[Tristan] was out of the country, and we wanted to tell everyone together," Khloe said. "It's actually all caught on 'Keeping Up,' which I'm excited about because everyone -- they get to see all the stuff I was going through without them knowing."
The Crew of 'KUWTK' Knew Before Her Family Did
"So the crew knew you were pregnant before your sisters knew you were pregnant?" Kimmel asked.
"They did, yes," Khloe revealed. "I've known the crew since 2007. We've had pretty much essentially the same crew, and they've been involved in so much -- the best and the worst of our lives."
When Kimmel asked Khloe if she was getting all kinds of advice from Kim, Kourtney and Kris, Khloe smirked and said, "Yeah, and a lot of it is unwanted."
Khloe admitted big sister Kourtney was the one giving her the hardest time.
"Kourtney gives a lot of advice, and I think it's so sweet, but I don't want to do some of that stuff," she said.
Some of the advice Kourtney's given her sister includes not letting the baby have any plastic toys and getting rid of the TV Khloe wants to put up in the nursery.
"I'm like, if someone buys blocks, I'm allowed to have f-cking blocks," Khloe told Kimmel. "Like, let me experience things. It's either her way or no way, so I'm trying to -- it's not what you say, it's how you say it. We've been fighting a lot lately, and we never fight."
Where's She Having the Baby?
Khloe said she's planning on having the baby in Cleveland, Ohio, where Tristan lives and plays for the Cavaliers.
"If he's got a game that night, will he miss the game?" Kimmel asked. "Have you said, 'You better be in that room when the baby comes no matter what's going on,' or is it up in the air?"
"I haven't said that," she replied. "I just kind of assumed that was known. You have to say that?"
Kimmel replied, "Well, yeah, because a lot athletes will not be there because..."
"Hell no," Khlow interrupted. "No. He has to be there."