What Is Belinda Blumenthal Reluctant to Give Back to the Duchess?

Before driving back to the motel, Belinda decides she is done. She wants the Duchess to collect her own trailer and carry on without her. She will also, reluctantly, return the horse-riding outfit that "had served her extremely well" all Sunday evening. The hosts point out that she took it, so "return" is a generous word. She leaves The Horse and Jockey while the night receptionist, Sam, is on kitchen duty, and she does not stop to say goodbye. The company is paying for the room and the meals. The thing she hesitates over is the Duchess's riding uniform.