Looking for story: married couple work tgether at a resort, husband gets wife to fuck a guest on a balcony while he watches from vacant room.

[Parkerstarkstrange]

Trying for years to find this story.
A married couple works together at this resort, I think they also met there. One night husband waiting for wife to get done with her shift, sees her get briefly fingered by a pushy guest before she stops it. Husband eventually convinces her to fuck a different guest on a balcony while he watches from a vacant room.