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Rob Kardashian gets upset, tweets half-sister Kylie Jenner's phone number

While millions of people watched the first presidential debate of the election cycle, the celebrity world had news of its own.

Rob Kardashian, brother of Kourtney, Kim and Khloe Kardashian tweeted the number of his younger half-sister Kylie Jenner.

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E! News reported that Kardashian was upset with Kylie when she put together a baby shower for Kardashian, but did not invite his pregnant fiancee, Blac Chyna.

Chyna and the Kardashians have regularly been at odds -- although at times friendly -- with each other since Jenner has been on-again, off-again with rapper Tyga. Tyga was once engaged to Chyna, and the two have a son together.

The tweets -- which are still up at the time this story has been published -- reference a baby shower his family threw for him without inviting Chyna.

"Didn't invite the mother of my child to a baby shower you all were trying to throw for me?! You all must have lost your (expletive) minds," Kardashian tweeted Monday.

But that was not before Kardashian tweeted Jenner's number with little to no context, except to say that he was not hacked and it is indeed him tweeting the digits.

"Kylie's #….I ain't hacked either this is Rob dog lol," he tweeted along with the cellphone number.

Twitter gave the number some calls and texts, but a call to the number gives an automated message that it is no longer active.