Find Your Way Home (слэш)

Fill for ITAB prompt:
I just cannot manage to trim this anymore, so... 1/2. Imagine an ABO where Tony and Steve are together. Then Bucky is found. Steve decides that he wants to try a relationship with Bucky because he always kind of loved him and Alpha/Alpha relationships are okay now, so why not try? He breaks his bond with Tony. Bucky is appalled because that just wasn't done, and he wasn't interested in Steve. 2/2 Back then, omegas who had their bonds broken because their mate died in the war were cared for by the Alpha’s family. Bucky and Steve aren’t blood family, but they’re close enough. Bucky starts to take care of Tony, and the two of them end up falling for each other. They’re both nervous because neither wants to hurt the other.