Rachel Roy had a previous relationship with Solange Knowles.
Here it's clear that Rachel was tight with the Knowles clan as well — Solange attended the 2012 Met Gala with Rachel and wore one of her custom-made designs. But where do the cheating allegations come into play? It all traces back to a scandal at the Met Gala two years later, in 2014. We're sure you remember: the incident where Solange attacked JAY-Z in an elevator while Beyoncé stood idly by.