My wife knows I'm bi...she is as well. When we first got together, we went to swinger clubs in Chicago, danced our asses off in Boystown, and hooked up for hot sex with others. Unfortunately, she got sick (cancer 3 timed over the course of 5 years), and the chemo, drugs etc required to keep her alive killed her sex drive. I travel a lot, and I usually do all my playing on the road...she knows, and accepts it, and has no problem with it, though she rarely asks me about it. So in a sense, yes, I hook up in secret, except for when she asks me, and then I'm completely honest.