This answer contains spoilers… (view spoiler)[I read somewhere that Hausfrau is a reinterpretation of Anna Karenina. It's not meant to have a happy ending, it's meant to ruminate on the futility of change. I think the sentence in the book that talks about shame, where it says that once a woman is shamed she will always believe herself to be fundamentally flawed, sets up the ending perfectly. Anna did not see a way out for herself—she was never going to get her sh*t together, because she didn't believe it could be gotten together. (hide spoiler)]
Susan But she had gone too far to turn back, or try again, or change, or go forward ... she felt predestined by her mistakes.