Calvin 'Accused Rita of Cheating'

Amid the speculation surrounding Calvin and Rita's recent split, the truth appears to have emerged as to the real cause of the breakup.

A source has revealed that Calvin Harris became upset after discovering that girlfriend, Rita Ora, had been in touch with ex-boyfriend Rob Kardashian.

The source explained: “About a month ago, Rita was in touch with Rob because she was worried about him – he’s put on so much weight and she’d heard rumours about him heading to rehab.

“She knows he blames their break-up for his weight gain, so she just wanted to check in on him. But Calvin found out that they were back in contact and they just had this massive row, where he accused her of cheating. She tried to explain, but it seems he has serious issues with trust.”

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It seems the couple may have already been on different pages when it came to their romance with Calvin wanting to settle down despite finding it hard to trust Rita.

The insider added: “Calvin wanted to have kids and get married, but he was always reluctant, because he seemed to find it difficult to trust her.

“Rita denied that she was doing anything wrong and told Calvin he was being unfair. That was the beginning of the end. Rita was devastated and pleaded with Calvin to take her back, but he was done.”

Watch the video for Rita's comeback single 'I Will Never Let You Down' now:

Check out our gallery of the shortest ever celebrity relationships here.