In Genoa City, family secrets are currency—and Jack Abbott just spent his last ounce of patience.

For decades, fans of The Young and the Restless have watched Jack Abbott endure betrayal after betrayal from his younger brother Billy. Whether it was romantic sabotage, business betrayal, or reckless impulsivity, Billy has always tested the limits of Jack’s forgiveness. But now, Jack isn’t just done—he’s unraveling the truth behind a lifelong resentment he’s tried to bury. And it starts with one of the biggest secrets the Abbott family has ever kept.

In a raw and emotionally explosive scene, Jack confides in Tracy why this latest betrayal cuts deeper than any other. It’s not just Billy’s decision to side with Kane Ashby, or to walk away from the company their father built. It’s the fact that every time Jack looks at Billy, he sees a reminder of a lie that nearly destroyed him: the truth about their biological parents.

According to Jack, his lifelong struggle to accept Billy as an equal isn’t just about Billy’s recklessness—it’s about identity. “You want to know why I don’t trust him? Why I can’t?” Jack asks Tracy in a broken voice. “Because he doesn’t carry the same blood. Not the way I do. Not the way Dad did. And maybe I’ve been punishing him for that every day of his life.”

This revelation hits hard. Long-time fans will remember the dark period when Jack discovered that John Abbott was not his biological father. The news shattered his world, sent him spiraling, and forced him to question every decision he’d made to honor the Abbott legacy. But what viewers never knew—until now—is that Jack isn’t the only Abbott with parentage secrets.

According to a confidential conversation Jack had with his late mother, Dina, there was always speculation that Billy may also not be John Abbott’s biological son. It was never confirmed—never proven—but the doubt planted a seed in Jack’s heart that only grew more bitter with time. And as Billy continued to defy him, disrespect the company, and make deals with men like Kane, Jack’s buried fear turned into a lifelong grudge.

Now, with Billy aligning himself with a man Jack sees as a predator and turning his back on the family business, the gloves are off. Jack isn’t just cutting financial ties—he’s cutting emotional ones too. He tells Tracy that if Billy wants to stand alone, then he should be prepared to carry his name alone as well. “I’m done protecting him. And if he ever dares to walk back in here, I’ll remind him whose name is carved in the foundation of this company—and whose isn’t.”

Whether the parentage speculation will become public, or even confirmed, remains to be seen. But one thing is clear: Jack’s war with Billy is no longer about business. It’s about blood, betrayal, and an identity crisis that’s been brewing for decades.

Has Jack crossed a line from wounded brother to ruthless patriarch? Or is this the moment Billy finally learns who he really is?

And more importantly… will either of them survive the fallout?