This Movie is a Feminist Masterpiece
It's actually about Lorraine being eternally trapped in a life that is dependent upon her limitations as a woman. In the original timeline she falls in love with George after he has an accident (having never really noticed him before). Then, in the new timeline, she is manipulated by her son into ensuring his own existence by falling in love with George because he fights for her honour.
At no point does she actually get to have her own life.
And in the end, she is left to live a banal life with a banal man and three banal children.