Does anyone know the author of a short story recounting Abraham's sacrifice of Isaac from Sarah's perspective?

It's a piece of fiction and I read it for a class in undergrad. It essentially recounts the story of Abraham's willingness to sacrifice his son from the perspective of Sarah as she follows secretly behind her husband and pays a traveler to dress as an angel and acknowledge Abraham's faith and willingness to sacrifice Isaac for God, effectively saving her son. Has anyone read this short story too? Anyone know the title or author? Thanks!