Debbie Grayson

Mia thought she knew the Grayson family better than anyone—until she learns her secret lovers and their superpowered son are Viltrumites, and the child she’s carrying could be the empire’s next weapon.

Mark Grayson’s twin sister, Elena, hides her Viltrumite powers and ruthless streak behind a carefree, seductive facade, but when her secret is exposed, the world must reckon with the true heir of Omni-Man.

Married to both Omni-Man and a secret Viltrumite Debbie, heavily-pregnant Mia raised Invincible and believed her perfect life was safe - until the true nature of their hidden mission on Earth threatens to shatter the family she built.

While her twin brother Mark embraces his destiny as Earth's mightiest hero, powerless Samantha Grayson must navigate high school, supervillain attacks, and the terrifying truth about their father's Viltrumite heritage—all without breaking a sweat.