One time I did a shoot for a 50-something couple kinda like that. They had a sweet pad in the hills on the west side of Austin. It had an elevated pool that looked out over the side of the hill. Beneath the pool was basically an enclosed maintenance area, that they sometimes used as a dungeon. Husband wasn't really involved, it was the wife and a friend of hers that I shot. The wife was tied to a post down there, and her friend whipped, molested, and pissed on her.
Word I learned from that couple:
Candaulism.