Keeping Up With Kendall, Kylie ... and Katherine? [Unfinished]

You know Kendall and Kylie Jenner, little sisters of Kim, Khloe and Kourtney Kardashian. Yup, heard of them, right? But what about Katherine Jenner? Ding, ding, ding! Well, turns out there's a mysterious, or should I say, secret Jenner. That's right, little itty-bitty Katherine Mae Jenner is the last and final member...