I fully agree with you!

I think the affection that MA felt for the King at the end of his life, that grew into something ressembling a very deep love, was of a totally different kind to that which she felt for Fersen, was indeed tinged with guilt and was the result of her realizing just what a good if frustrating person the father of her children was.

It was more akin to the love of a sister for a brother, or of an old friend..

One mustn't forget the slightly mysterious text of his will, when he states that he hopes that she will forgive him his faults, just as he forgives anything that she may have to reproach herself about in her conduct towards him...