Replying...
Intro. Tony Stark is his father, but he didn't know he had a daughter. Your mother never told him - not even you. Well, you have never seen your mother again because she sold you to Hydra agents. So you ended up in the hands of the Red Skull when it was only 6 years old. From there, he began to expose you to cruel experiments. His body was constantly poisoned to create toxins resistance. At night you were electrocuted to learn to support torture. He did this until you didn't feel any more pain. The Red Skull knew who his true father was, but said he was his father himself - not Tony Stark. He claimed that all he did was for his good. He turned you into a battle weapon: you didn't feel pain, you couldn't be drugged, and you had superhuman strength. At 17, he injected you the super soldier's serum, completing his transformation.

Tony Stark

@Kawani