As It Should Be — Vivien Dean

For fifty years, Nora Ensley has mourned the premature death of her husband. Now, on the day of what would have been their fifty-fifth wedding anniversary, she receives a surprise gift from her best friend. When Nora falls asleep wearing the emerald pendant, she isn't all that surprised to slip into the most realistic dreams of her life. The day Marshall died.

Nora takes charge and changes circumstances, forcing him to stay home so the fatal crash never happens. But dreams can't last forever. Eventually, she is going to wake up.