Brit singer Rita Ora and Rob Kardashian have only been officially dating for a couple of month, but their relationship has already gone down in flames, according to the Sun newspaper.

They report a series of scathing tweets from the little brother of the famous Kardashian sisters, Khloe, Kim and Kourtney, which apparently said: "How can a woman who is so busy trying to start her own career have time to be with so many dudes all while in a relationship?

"She cheated on me with nearly 20 dudes while we were together, I wonder how many she will sleep with now that we apart. But I mean 20?!"

They also reported a tweet from Khloe which said "Cheaters never prosper @RobKardashian ill be home today... Try and smile little brother.

However, every one of these tweets has now been deleted apparently. In fact, almost everything on Rob's twitter page seems to have been deleted, leaving only two remaining tweets and two photos. His 3 million followers will surely not be happy. 

The breakup itself is not exactly a happy affair and a source told the Sun: "It's really sad - they really liked each other but with him living in LA and her over in London, it was becoming impossible to maintain a relationship.

"They'd only decided to go public with the romance a couple of months ago so as not to put any pressure on themselves but they've already split. Rob has now deleted everything on Twitter that reminds him of Rita." Despite the relationship Kim's been on the hunt for a new girlfriend for Rob anyway, so it's doubtful that he'll stay single for long. Rita as yet hasn't given her two pence on the situation, either via Twitter or an official statement, so as yet no one can confirm whether she really did cheat on him at all, let alone with so many people.