I had a de facto who was suspicious, but she thought I was having an affair rather than just going to a massage shop. She obviously had some sense I was having sex with another person, but I don't think she would have known anything about the world of massage and FS shops, so her suspicion went straight to an affair. I would come home from punting and she would ask me whether I had been out with another woman, asking all the wrong questions at all the right times lol