While we’ve been wondering if Rob Kardashian and Blac Chyna are already showing too many red flags in their relationship — which we can blatantly see via their reality show AND social media — at the moment, it’s sibling drama that’s going down. As the family preps for Blac Chyna’s baby shower, things have apparently gone from bad to worse between Rob and sis Kylie, and to prove it, Rob just shared Kylie’s phone number with the entire world.

Though we’re all aware that things aren’t exactly cool between Rob and Kylie (y’know, because Rob is having a baby with Kylie’s boyfriend’s ex and baby mama), the family has taken their beef public once again. Shocking!

Stemming from a baby shower the Kardashians are apparently throwing for Rob, he seemed to think that Blac Chyna wasn’t getting an invite, at least according to his revealing tweet.

He prefaced that with an even MORE revealing tweet: one containing Kylie’s phone number, surely not something she’d want made public. From the emoji in his tweet, he found this hilarious. We have no doubt Kylie did not. And, yep, she’s already changed her number, so no need to try to call her up to see what she thinks.

What’s the jerkiest thing your sibling has ever done? Tweet us @BritandCo!

(h/t E!)