Did Solange accuse Jay Z of cheating with Rihanna in elevator bust up?

Solange Knowles viciously attacked her brother-in-law Jay Z in an elevator back in May, however the reason behind the unprovoked incident has remained a mystery.

Solange attacked her Jay Z in an elevator as the pair and Beyonce left the Met Gala after party at the Standard Hotel in New York.

The family remained tight lipped on the reason why, but now a new report suggests that the row may in fact have been about the nature of Jay Z’s relationship with his one-time protégé Rihanna.

A source told New York Post’s Page Six that Solange’s elevator outburst came after she concluded the rapper was planning to meet Rihanna later at a club without wife Beyonce. ‘Solange was like, “Enough is enough – you must be [screwing] Rihanna,”‘ the insider said.

They then added: ‘To many people who know them, they know it’s not out of the realm of possibility.’

Perhaps aware of the rumours, Beyonce ensured she posted an Instagram image showing she and Rihanna posing together after the Met Gala.

Meanwhile, additional sources told the newspaper that it is not a matter of if but how Beyonce and Jay Z will split.

Currently the only time they spend together is on their joint On The Run tour where the newspaper alleges they are travelling with marriage counsellors.

“There’s face-saving involved – they don’t want to be looked at like other celebrities out there,” the source said.

“They are business people first, entertainers second. Husband and wife comes somewhere down the line.”