Kim, who welcomed her second child, son Saint, back in December, is adjusting to having a newborn around again and took to Twitter to vent about the lack of sleep that comes with looking after a little bubba.
She told fans she was becoming "delirious" thanks to being woken up in the night and her tweets didn't go unnoticed by mum-to-be Chrissy...
Kim had told fans: "This 4 am feeding really kills me. I'm like delirious."
Chrissy then replied with an emoji suggesting she wasn't looking forward to getting up at all kinds of hours, prompting Kim to respond: "Ohhhhh just you wait and see.... Lol."
@KimKardashian can you take her since you're already up?— christine teigen (@chrissyteigen) January 25, 2016
Chrissy then replied: "@KimKardashian can you take her since you're already up?"
Lip Sync Battle host Chrissy is expecting her first child with husband John Legend.
The pair announced their exciting baby news back in October last year, with Chrissy telling fans: "John and I are so happy to announce that we are pregnant :). As many of you know, we've been trying to have a baby for a while now. It hasn't been easy, but we kept trying because we can't wait to bring our first child into the world and grow our family. We're so excited that it's finally happening."
She and John have since revealed they are expecting a baby girl.
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!