I have never considered it cheating. Neither has my wife. We have no secrets. We talk about our cyber sex partners with one another and sometimes even compare notes as to what each one likes in case we trade partners. We never actually meet someone unless the other spouse knows who what when and where. We prefer to swing together , same room etc. if we do an actual meet. but we have gone off alone. It has done nothing but spice up our sex life and make our marriage stronger. We both know where HOME is.