My husband likes to watch me have sex with other men, I enjoy it but feel guilty, does anyone else experience this?

IO watch my wife have sex a number of time every week and enjoy it we have an erotic massage business and we both give the massage but the gentlman are there usually for one purpose to fuck my wife so I back away and let them have their way and I fuind I really do enjoy the excitment of seeing her getting fuceked I usually position myself so that she can suck on my cock while being fucked adn I try to release on her face when the client relases inside of her, it is quite sitmulating and does not seem to get old as we have to do it 20 or so times a week.