The moment she fucked Sam, any chance of a normal life was lost. At least, that's how I see it. She was always mentally fucked up before that, but that just put her on the path to no return.

Girls at her point in her life, in the situation she's in, don't find long term partners and get married. There was a point in her life where she could have salvaged something approaching a normal life, but that ship sailed long ago.