Helen, you truly have nothing to be sorry about, you fought so many battles with her and when it came to the one you knew she couldn't beat, you listened to her. That is something to be proud of, you loved her enough to put your feelings aside and do what was best for her, and this truly was. You would only have had reason to be sorry if you had let her linger on and suffer, and you didn't. She knows how much you loved her and that you did this for her.