The R&B diva is in the middle of a contentious divorce with estranged husband Kendu Isaacs and previously filed court papers claiming he spent over $420K on his unnamed girlfriend.
But now a report claims the mistress was Mary’s 28-year-old protégé Starshell, who was on the “Family Affair” singer’s label.
“Everyone knew. Mary was the last to know, but it’s like, how do you not know?,” a source told PageSix.com.
Another insider co-signed on the cheating claims adding: “You’d see them out in the studio together, having dinner without Mary. And then Mary would be at events with her, and it was awkward because it was obvious they were sleeping together.”
It should be noted that neither Mary, Kendu nor Starshell have confirmed or denied the report.