Read it. It’s quick.
A jealous couple role-plays the suave businessman and the whore. The role-play gets out of hand as each, given permission to perform the troubled and erotic, imagines the other buying/selling their body to another. In the role-play, each lover is both the beloved and the betrayed. By performing infidelity with each other, they feed cheated.
I believe it is the fear under the skin of all relationships (erotic/not) that the person you know is not the person they are. That all love is a performed fraud. That we are simply mirrors for our beloveds cravings rather than a pure independent being, joyously compatible and entirely shared.