Well, whether or not it was a mistake that you took her back right away doesn't matter as much now, because you have been piecing a year. But the fact that it was not her who decided to give it up and it happened so quickly does paint her actions today. She went from him to you and never really mourned the end of her A. That sounds dumb, I know. But as a single woman now, I am the one who can't understand a person who goes right into one relationship to the next. I need time to mourn the relationship (too much sometimes). Her mourning might be extended because she never really got to do it.
You say she showed true remorse within one week of the OM dumping her? What did that true remorse look like?
