Motivated by jealousy of her pretty and famous sisters, Gladys Bella — the little-known Bella Triplet — has emerged from the shadows and vowed revenge.

Gladys has been rumored to be the “dark secret” of the Bella household — a physically and emotionally stunted runt “who got the short end of the genetic stick,” according to a source close to the Bella family.

“They kept Gladys locked in the attic for most of her childhood, sending her table scraps on a makeshift dumbwaiter,” the source told Kayfabe News on condition of anonymity. “As far as the outside world was concerned, Mrs. Bella gave birth to a pair of beautiful twins, not triplets.”

Only in recent months has Gladys made her vengeful intentions known, mostly through cryptic, hand-scrawled letters mailed to WWE headquarters in Stamford, CT.

One such missive reportedly read: “Gladys make pretty sisters unpretty — pretty soon!”

Brie and Nikki Bella have dismissed the notion of a long-lost triplet as “just some silly celebrity gossip,” but they recently hired two full-time security guards, lending credence to the idea.