The news comes from her recent visit on The Ellen Degeneres Show, where she talks about her baby shower from this past weekend and how her oldest child, North West, wanted all the toys for her little sister to be put in her room.
Kim's given the biggest hint yet that her sisters are expecting babies whilst playing "Spill Your Guts or Fill Your Guts" with James Corden and the video above shows the moment in all its glory. "I've had to explain to her: "When you come into my room in the morning I have to be with baby sister, I have to feed her".
"My daughter thinks she's tricky", the Keeping Up With the Kardashians star, 37, said. Instead of answering, she chose the incredibly unappetizing smoothie (which you can see at 5:55).
"We don't have a name", answered Kardashian West.
WATCH: James Corden Asked Kim Kardashian If Kylie & Khloe Are Pregnant & Her Reaction Said Everything
Kim Kardashian has admitted that she eats salad pretty much every day, and she's never been known to be an adventurous eater by any stretch. At the baby shower I was like, "I don't want to play any games, measuring the belly, that won't work out this time". [At the shower], I had everyone write a name down on a tile to see if anything sticks. They chose the surrogate option because Kim had had two particularly hard pregnancies with North and Saint, and was advised by doctors that a third pregnancy could be risky to her health. "We're freaking out. We don't have a name", the reality TV star said, adding that she didn't fall in love with any of her friends' suggestions at the party.
"[But] I'm not vibing on it".
Ellen also suggested she and Kim dress up in disguise and go shopping together, so here's hoping that segment happens soon.