Beyonce Knowles' sister Solange attacked Jay-Z in the lift fight over Rihanna, according to reports.

A source close to the couple told the New York Post that Solange was like, enough was enough adding that the rapper must be screwing the 'Umbrella' singer, the Mirror reported.

The source said that many people who knew the couple, they knew it was not out of the realm of possibility.

The source added that things have been bad between the 32-year-old singer and the American rapper for quite some time.