The Devil In I (Winter Soldier Fanfic)

Meet Grace Romanoff, younger sister of Natasha Romanoff, aka Black Widow. They are orphans, their parents died on a mission for S.H.I.E.L.D as agents.Grace is twenty-three years old and lives in her sister shadow. People are always telling her to be more like Natasha, the faster, smarter, stronger and prettier one. Natasha also has better senses due to some unknown reason. 

Grace believed she had no reason to live, that was until she met the Winter Soldier. Her world is turned completely upside down as Grace begins to develop feelings for him. She will do anything possible to protect him.