What is a short summary of the story, The Red Ribbon, in the collection, The Color Master?

The Red Ribbon follows a married couple named Janet and Daniel. Their sex life has grown stale, and one day, Daniel admits to having an idle sexual fantasy about sex workers. Janet suggests that they do a roleplay, in which Daniel will have to pay her for sex. Janet becomes fixated on the roleplay, and she begins demanding payment from Daniel every time they have sex. Eventually, Janet realizes that the problems in their marriage have not been solely in their sex life, but rather in the increasing difficulty they have been having in emotionally connecting.