Kylie and Khloe are both pregnant, and even due around the same time.
But while Khloe finally confirmed that she's pregnant, months after the world learned of it, Kylie's staying shy ... and mostly out of sight.
In fact, fans feared the Kylie might have opted out of her family's Christmas party. But she was there. And there are photos to prove it.
Fans have been wanting to know where Kylie Jenner's baby bump is for a while, now.
We could speculate all day about what it is that makes fans so eager to see baby bumps in general.
In Kylie's case, though, it's because she's kept it secret for so long. Sure, Kylie's baby bump's been spotted once or twice, but she's kept it under wraps to the point where some fans worry that they're being pranked.
Others have begun to suspect that Kylie has already given birth -- which I don't think is the case, but it's understandable that people wonder if there's a point to this mystery.
(We know that mystery for mystery's sake got a lot of viewers hooked on Lost, but it's perhaps not the best way to approach a pregnancy)
So, the Kardashians are fabulously wealthy and they're also devout Christians.
Christmas is a big time of year for that family. And of course they have a huge party.
Initially, fans worried that Kylie was M.I.A. She's been reclusive -- to say the least -- for months, now.
But, clearly, she was at her family's party.
And we have the photo booth pictures to prove it. Not to mention an exchange between the pregnant sisters in which Kylie expressly confirms it.
We have to wonder if Kylie and Khloe -- both pregnant -- took matching, side-by-side baby bump photos that they didn't choose to share.
What we don't have to wonder is what Kylie was like at the party.
People's source reports on how Kylie and her baby bump looked:
"Kylie looked great but didn’t really draw any attention to her baby bump. She still acts like she wants to keep her pregnancy private."
Well, that's Kylie's choice, even though the entire world's known since September. But we've heard that Kylie's been having body image issues. So ... that's her choice.
"Everyone had the most amazing time," the source added. "Kris always throws the best parties. It was all gorgeous. There was no drama."
In case anyone wondered if this was just someone covering for Kylie (perhaps at Kris' insistence, as that bit of praise seemed almost over-the-top for an anonymous source) ...
Khloe and Kylie had a conversation about that on Snapchat, complete with goofy Snapchat filters.
"Merry Christmas! People think you weren’t there last night," Khloe said.
"I was," Kylie confirmed.
Khloe then added "She's a secret little bunny," which we already knew. Kylie Jenner's due date is February 4th and she still hasn't confirmed it to the world. So, yeah. Secret.