To make matters more confusing, their eldest sister Kim Kardashian is also reportedly expecting her third child to husband Kanye West through a surrogate.
Kim took to Twitter to deny being angry about Kylie's pregnancy but didn't confirm nor deny the surrogacy rumours (or whether Kylie was, in fact, pregnant). Kris said they're "not confirming anything" the same day as Caitlyn accidentally confirmed something, and Kourtney posted a cryptic Instagram photo.
Could things get any more complicated in the Kardashian/Jenner clan right now?
Below, fans taking to Twitter to express their attempts at Keeping Up with the Kardashians...