Sometimes we make decisions in our lives that we feel that is the best for all concerned. You were hopeful that the outcome doing what you did would be positive, but you had no control over the outcome. You made that decision because you thought it was in her best interest.
Try to forgive yourself for doing what seemed to be best at the time. She sounds angry, and just try to be there while she works through it, but the past is the past. Just tell her she can live in the past, or go forward.