Rob Kardashian's relationship with his family has always been a little... weird to the public eye. Remember that time he posted a picture of "the bitch from 'Gone Girl'" and said it was Kim? Yeah. Nevertheless, when the Kardashian brother returned to Twitter on Tuesday night, he thought he'd help Kim out with her morning sickness.

After his sister tweeted about her ongoing battle with morning sickness from her second pregnancy, Rob reminded her that he sent her a little audio antidote.

Of course, the Kardashians got coy and clever -- I think they get joy out of making sure we don't always know what's going on between Kim and Rob. "Should I post it?" Kim asked. She didn't, and I'm sad.

But Rob posted lyrics to a French Montana song (French was dating sister Khloe, if you needed a refresher) in response. Whatever does he mean?

There was some reported tension between Kim and Rob last year when he missed her wedding, although Kim later said it was fine. She was also seen mysteriously carrying around a cut-out of his head around Armenia. As for where they stand now? Who knows.