The Lover by Amanda Brookfield
When Frances married her husband the ten year age gap seemed nothing to worry about. But twenty years later Paul's death in middle age leaves Frances a widow at only forty-three. One life is over. Is there a new one about to begin? It seems so when, as her grief begins to lessen, she meets Daniel, a university lecturer who clearly adores her. But Daniel is only twenty-six, and this time the age gap is bringing with it all sorts of problems...