Middleground (2017)

Trapped in the hotel of her husband's various business meetings, a woman finds herself adrift between lives when she is approached by a stranger with vivid memories of an affair with her that she can't remember. She's always sitting there with her husband. He's always getting up to take a meeting. The other man always comes and sits, the stranger, who always insists on his account of their past affair, and every time he does, it's more convincing.