A Young Assassin

When Natasha Romanoff discovers she's pregnant she uses a lengthy mission to cover it up and gives the baby to an orphanage so the child can live a normal life. The Red Room adopts Vanya Romanova pressing her through torturous training. Now Vanya's the Black Mamba of HYDRA. When she discovers S.H.I.E.L.D. will she continue on a path of destruction or will she change her alliances?