Jen, Most people have skeletons in their closets and you only live once. Go take a walk on the wild side and make sure the guy is a discrete gentleman, sexually experienced and very well endowed. In other words fish for your dream guy. Judging from your pics you would be able to have what ever your heart desires.
As far as your husband goes, if he's in any way normal, has fantasies of his own. One day in the future he's going to let slip a hint of his. Don't miss the hint show interest and have a diolog about it. At some point when you feel safe come clean. It will be the most erotic moment of HIS life. Your judgement is critical and life is full of risks. Know the risks if they are unexceptable keep it a fantasy. They are loads of fun to.