In news absolutely NOBODY saw coming, it looks like Rob Kardashian and Blac Chyna are engaged?! Yep, we know it's soon - we've only just got over the fact they're even together in the first place. But in this Instagram snap, tellingly captioned 'YES !…!…!', Blac confirms the happy news. There are also videos of the couple celebrating, with Rob Kardashian happy crying (literally) in the corner of a club, while the couple are congratulated on their news. 

In terms of that rock, Rob enlisted friend and jeweller Ben Baller to help him choose the 7 carat ring, in a round, brilliant, triple excellent cut set on a platinum band. According to Baller, Rob wanted the ring to be 'elegant but impressive', and that Blac Chyna thinks it's perfect.

Posting a video of the ring on his Instagram page (you might need to wear sunglasses with the dazzle on this diamond), Ben captioned the video 'Congrats to @RobKardashian & @BlacChyna on getting engaged. Rob, I have never seen you this happy before and I've known you since you were a teenager. I'm glad you came to your day 1 homie to get this massive for your lady. You know I don't play when it comes to diamonds. God bless #7Carats #VVS #IFANDCO #BlacChyna #RobKardashian'

So Rob is engaged to the baby-mama of his half-sister's older boyfriend (who is now the uncle to his own child), and the ex best friend of his other sister?! It's as complicated as it sounds…