Pallavi, sex is a beautiful experience. Do not hesitate, if your hubby wants to share yo, go ahead and enjoy different men while you can. Best thing about sex outside marriage is you can live your fantasies, enjoy the euphoria of being a naughty or bad girl and shed all inhibitions while experimenting with different things and deeds. Like BDSM, mistress-slave, rimming...just about anything that does not work with husband. You can indulge in open dirty talk, share your fantasies with your bed mate, share dirty little secrets and feelings without any inhibitions...after all you are not going to live with the guy. Believe me, most guys will happily betray their secrets and dirty thoughts when they sleep with a woman with whom hey are not in relationship of any kind. You can use raw language to describe your needs or make him do things.
Go for it. Heighten your sex life and explore things you have not experienced.
But then, you decide the rules fully. Whom you agree to sleep with, what he must do, where to meet him, no smartphones or cameras in the room...etc.
You will select whom you like...that is a rule and the best part.