He keeps hinting that he is!

Rob Kardashian either has an active imagination or a secret he's hiding, because the reality star alluded to a secret love child on Twitter yesterday, and this wasn't the first time he's addressed it, either!

"Was with my baby mamma tonight," Rob tweeted at 3:24am to his more than five million followers. Weird! Kim K's brother hasn't been linked to anyone since his split with Rita Ora, so we have no idea who he could even be talking about.

Over July 4th weekend, the sock designer tweeted that he was looking forward to spending time with his "son". "Happy I got my son with me for the 4th tomorrow! Can't wait to watch fireworks with my little man! Hope everyone is safe!" he wrote before issuing a denial that he has a kid. "Those who know me know I play and I do NOT have a Son. Y'all got my mama emailing me asking if I have a Son lol goodness hahaha. GOODnight," he clarified.

This is a weird thing to lie about!