A post shared by CoreVizionTv (@coreviziontv) on Apr 17, 2017 at 6:54am PDT

Mary J. Blige’s divorce drama is pretty sad, especially now that we know her young protege, 28-year old Starshell, was having an affair with Mary’s estranged ex husband Kendu Isaacs while they were together.

“Everyone knew. Mary was the last to know, but it’s like, how do you not know?” a source told Page Six.

Starshell is an up and coming artist that Mary signed to her Matriarch Entertainment record label. Together, they appeared on red carpets and TV appearances — all to help build Starshell’s profile, but turns out she was building more than that.

“It was more like one of those things where you end up believing what you want to believe. But Mary had her suspicions,” another source said.

The first source continued: “It’s really f – – ked up and low to have it done to her that way. Had it not been for Mary signing her, investing time and money . . . Because no one cared about her music,”

In court papers, Mary said Kendu spent over $400,000 on his “girlfriend” without mentioning her name. The couple was together for nearly 13 years before filing for divorce, but Starshell was always under the radar.

“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.”

As for Kendu: “He was verbally controlling. He’d say the most negative s – – t to her five minutes before she’d hit the stage.”

Kendu’s lawyer, Robert Brandt, had a different story: “Allegations that have been made about Kendu are false, unfair, mean-spirited and sad. The court can deal with it if it’s relevant. He’s a very pleasant guy. He’s not abusive. He’s not the one going to the press. His goal is to reach an amicable resolution with her and [have] this commentary cease and desist. It doesn’t help any of them. It’s misleading. He cares about Mary. He wants her to do well.”

H/T: Page Six.