On "Keeping Up With The Kardashians," the Kardashian-Jenner family present themselves as open books — but in actuality, they're pretty secretive. 

Kim Kardashian with Kris Jenner

Kris Jenner taught them well.

photo: Splash News

Momager Kris Jenner taught the crew to share only *certain* parts of their lives. 

So while the KarJenners have no problem letting fans watch their crazy antics on TV, whenever something shocking happens IRL, the family's first reaction is to keep tight-lipped. 

photo: Giphy

There are a handful of rumors that the Kardashians currently refuse to comment on: Khloe's pregnancy, Kylie's pregnancy, Rob's weight loss surgery...

But just because the Kardashians won't confirm or deny these rumors *doesn't* mean they won't turn out to be true. 

There were several rumors that the KarJenners side-eyed in the past, making fans think they were lies — until they turned out to be real. 

Case in point:

1

Kylie Jenner's lip injections

When did Kylie Jenner get lip injections?
photo: Instagram/@kyliejenner

Jenner lied about getting lip injections for years, claiming she had the appearance of a plump pout because she "over-lined" her lips.

But in 2015, Jenner begrudgingly owned up to her injections on the show, finally confirming one of the family's worst-kept secrets. 

2

Caitlyn Jenner's transition

When did Caitlyn Jenner begin transitioning?
photo: Instagram/@caitlynjenner

Long before Caitlyn publicly came out as trans, tabloids speculated that Caitlyn was transitioning. 

But because the family refused to acknowledge this major rumor, many fans just brushed off the headlines as clickbait-y gossip. However, Caitlyn later revealed that she was, indeed, a trans woman

3

Khloe Kardashian and Lamar Odom's breakup

When did Khloe and Lamar break up?
photo: Instagram/@kylie.glamm

For months, tabloids reported that Khloe and Lamar were experiencing trouble in their marriage. The entire family, however, continued to insist that there was no trouble in paradise — until Khloe finally hit Lamar with those divorce papers in 2013.

4

Rob Kardashian's relationship with Blac Chyna

Rob and Blac Chyna
photo: Snapchat

When Rob and Chyna were first spotted together, nobody could believe Rob was actually dating the ex of Kylie's then-boyfriend, Tyga. 

Fans flooded Kylie's social media, asking her to comment on her brother's fling, but Kylie refused to speak on the rumored romance. 

Her silence led fans to believe that Rob would never pursue Chyna — but then the new couple was pregnant and engaged one month later. 

5

Kourtney Kardashian's fling with Justin Bieber

Justin Bieber and Kourtney Kardashian
photo: ExtraTV

Given their 15-year age difference, no one thought Bieber stood a chance with Kourtney.

But alas, the pair were together constantly throughout 2016 (and a flushed Kourtney proved on "The Ellen Show" that her fling with Bieber was something worth getting giggly over).

Ah. Rumor has it!