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Bruce Jenner, Kylie Jenner

Jerod Harris/WireImage

You'd think at some point, the tabloids would tire of making up lies about the Kardashians and the Jenners.

But alas, they have not. On Friday, Kylie Jenner took to Twitter to slam a recent report that Bruce Jenner was not her biological father.

"It sickens me how editors of a magazine can proudly write a story denying that a 15 year olds father is actually hers," the 15-year-old E! star wrote. "Yes, my father is my father and no my parents aren't getting a divorce. You guys can't believe any of these magazines.. It's all bulls--t."

"And even though I don't let these stories get to my head.. Imagine you at 15 & someone telling you your father isn't your father," she added. "Shouldn't this be like illegal?"

"wait.. but you're ACTUALLY pathetic..," she went on. "going after a 15 year old and telling her her father isn't her father.. like WHAT? are you insane?"

"to who ever took the time to type those words onto that magazine.. DO YOU HAVE A HEART?" she wrote.

Of kourse, Kylie's big sisters had her back.

"That was some rant @KylieJenner," Kourtney Kardashian tweeted. "but I just want to say that I am proud and honored to have you as my sister. What a well spoken young lady!"

Kim Kardashian retweeted Kourt, adding, "I couldn't agree more! #soproud."

We kouldn't agree more either.