Kylie Jenner has proven to be pretty secretive in the past. She hid her pregnancy from the world until Stormi Webster was born, finally unveiling her daughter to the public. It must be difficult to keep things under wraps like that - especially when you've got paparazzi following you around everywhere you go - but Kylie is clearly able to keep to herself. You might think that you know everything about the Kardashians; their daily routines, favorite restaurants, and more are detailed on their reality show after all. However, Kylie and Travis have been leading the media into a frenzy over whether or not they're engaged. Jenner was spotted rocking a ring on her left hand after the Super Bowl and she may be trying to keep it a secret. If she is engaged, she somehow forgot to tell her sister Kim.

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Kim played dumb on The Tonight Show with Jimmy Fallon after the host asked if her sister was engaged to Travis Scott. "I've never seen that photo," said the businesswoman after Jimmy showed her a viral image of Kylie rocking a giant ring on her finger. "I mean I think she would have told me," admits Kim, looking pretty uncomfortable. "She's very secretive but I'm sure she would have told me. I'm not really sure." 

Either Kim is keeping Kylie's secret tight or she genuinely has no clue if her sister is getting married.