she was not citing her mother's unexpected longevity as a miracle, hense the phrase "sheer will" (her mother's own stong will to live). While many might prefer to cite this as an example of a miracle, stripedangel did not.
BUT, stripedangel does believe that God performs miracles still today. We differ (slightly) in opinion on this matter, but I understand what she is saying. I hope that this clarifies her intent for you.