Venuss!! How nice to see you again!
My line has fizzled out too. Some mothers become prolific grandmothers, and some mothers do not. My mother did not (one grandson, my brother's child). Her sister and her sister-in-law have created virtual dynasties.
So many women are tricked into motherhood simply by lack of education or knowledge. Once you ring the bell of knowledge, it cant be unrung.
Tell her its her fault she didnt pass on the desire for motherhood. Mine certainly did not. She actively suppressed any desires i had, starting in my childhood - discouraging playing with dolls, for example.
I am getting old (67) and i still treasure my personal freedom above all.