Y/N Stark, the younger sister of Tony Stark, is held back from taking part in any of her brothers work involving the Avengers...but desperate times call for desperate measures. What happens if during one of those missions she finds out something terrible about the man that she has fallen in love with? -Bucky Barnes x Reader- Quick Disclaimer: This Story Contains the following ~ Sex, Violence, Mentions of Mental Illness/Trauma, Substance Abuse, and Mentions of Self Harm. I will be warning you in the beginning of the chapter if these things will be mentioned but just in case you are sensitive to those topics, I am warning you before you read. Also, I don't take credit for any of Marvels work only Y/N's character is mine :) Welcome to Love & War