SO

Y/N Stark is a secret S.H.I.E.L.D. operative, known only to Nick Fury and her husband, Tony Stark. But Y/N has a secret even they don’t know—she is Steve Rogers’ younger sister, believed to have died during World War II. After being rescued from HYDRA decades ago, she built a new life in the shadows. When a mission leaves her critically injured, Tony brings her to the Avengers Tower for treatment. But when Steve sees her, he realizes the sister he lost nearly a century ago is alive—and she’s married to Tony Stark.