Rob Kardashian drops comment on Blac Chyna's pic...as E! News confirms they are dating

Once it comes to the Kardashians, E! News always gets exclusive confirmation and now they have confirmed that Rob is indeed dating his younger sister's boyfriend's ex-girlfriend. Their report below.

"E! News can confirm that Rob is dating Blac Chyna, but it's a tad complicated. A source tells us that there is "concern" surrounding the pairing because the insider feels that she is "preying" on Rob "during a weak time." The source is also concerned that she is only using him to get back at Kylie Jenner. Kylie and the model have been rumored to be feuding for a long time, given Chyna's previous relationship with rapper Tyga. She and Tyga share one child together. As for how Rob and Chyna made it official despite his tendency to stay indoors over the past year, the source tells us, "She and Rob have known each other for a while and she had been staying in touch."

Meanwhile, this evening when Blac Chyna shared a photo on instagram, Rob dropped a comment.