A New Low! Kylie SLAMS Rob & Blac Chyna After Dream Kardashian's Birth

While the entire Keeping up with the Kardashians clan went goo-goo over Rob Kardashian & Blac Chyna's daughter, Dream Kardashian, yesterday, there was one person in the family that was not as overjoyed: 19-year-old teen queen, Kylie Jenner! Click through 7 shocking photos to find out how the birth of Dream was a nightmare come true for Jenner.

Rob was beyond thrilled yesterday when his long-awaited beautiful baby girl, Dream, was born at Cedars Sinai Hospital in L.A.! However, Dream's mother Blac Chyna is engaged to Rob and is also the mother of King Cairo, 4, who was born to her ex Tyga. Tyra's now dating Jenner, of course, and Blac has been in a nasty back-and-forth battle on social media with Jenner for almost TWO years because of it!

Was this really the sweet message it seemed to be? Yesterday Kylie posted a Tweet that reads: 'I can't stop looking at her @robkardashian @blacchyna she's beyond beautiful, a dream.' But according to an insider, "When she posted that, she never even had seen the baby! Also, if you notice Kylie included a sad crying face emoji instead of a happy face. It seemed like a dig."

Yesterday, while the entire KUWTK clan was celebrating the newborn's birth, Jenner was, of course, hanging out with Blac Chyna's first-born son, King, instead! She posted Snapchat videos seemingly showing off how she was playing stepmom.

As RadarOnline.com previously reported, Jenner is the one sister in the family that Rob, 29, cannot tolerate. Said the source, "Rob seems to think that Kylie is everything that is wrong with his family!"