You are Steve Rogers sister. Growing up it was always you, Steve, and Bucky Barnes. You are only a year younger than Steve so yall were all very close. You and Bucky have always flirted. Especially in high school. Then yall started dating. It was so good. Then the war broke out. Steve was so desperately trying to join. Bucky had enlisted. You went in as an SSR field agent with Peggy Carter. Steve became captain America. They made you a super soldier too. Not for the public. Just for missions. Then the 107 got taken prisoner. Steve got Bucky out and the Howling Commandos were off and running. You and Bucky are still dating. Right before the last mission he proposes. Then he falls. Years and years later you and Steve are avengers. Then you find Bucky again.