Amateur Model

Stella was a nice neighbour, and worked hard for charity. She was careful, chaste, a model housewife, and kept herself busy. Her first husband had died young leaving her comfortably off, so she could spend all her time baking and collecting for good causes. Stella was resigned to putting up with her life and was practical enough to just get on with it. Unexpectedly a young man came into her life, which renewed her vigour and enthusiasm.
What was very unexpected was that he would provide far more than that. He fired her sex drive, and as an eighteen-year-old boy he had plenty of vigour and enthusiasm to provide. She was swept ff her feet, in an unexpected way. She had no defence to his advances, not realising what he was up to until it was too late. She was naive, and he was seducing her in an unexpected way. Was he just using her? What would she do and feel when he moved on to a young girl his own age.
Surely he didn't mean what he said, as she was far too old for him, and at best, he must see her as a poor lonely case and feel sorry for her. Warning, this is a romance with a happy ending!