Kylie's Revenge! Jenner Fires Back At Rob Kardashian After Epic Twitter Slam

Keeping up with the Kardashians reality star, Kylie Jenner, has stayed silent after her brother, Rob Kardashian, slammed her on Twitter earlier this week — but that doesn't mean she's letting it slide! As fans know, Jenner, 19, and Kardashian have a long history of tension, but when the overweight Rob & Chyna star tweeted Jenner's cell phone number to his millions of followers, the feud got ugly. Click through 7 shocking photos as RadarOnline.com exclusively reveals how the reality teen drama queen just got her ultimate revenge!

As RadarOnline.com reported, the sibling sparring started over the fact that Jenner was putting together a second baby shower for her 29-year-old diabetic brother, in the hopes of ending the feud that began when Jenner started taking jabs at Kardashian's soon-to-be baby-momma, Blac Chyna, 28. But it all went up in flames when Kardashian found out his baby mama to-be would not be invited. Kardashian hit back on Twitter, and the shower was cancelled.

Days later, "Kylie has not apologized for anything and neither has Rob," a source close to the Kardashian clan told RadarOnline.com.

"Kylie and Rob had it out after that, and he told her some really nasty things," said the source. "He said that she was one of the most awful people he's ever met, and that she is not a sister to him, nor was she ever! He really thinks that Kylie at least should fess up to trying to start drama, but she has not even done that."

As fans know, Jenner's mother and frequent mediator, Kris Jenner, 60, is currently in Paris for Fashion Week with daughters Kim Kardashian, 35, and Kourtney Kardashian, 37. "Kris is overseas right now and so nothing is going to get solved," the source told RadarOnline.com.