I would say, be honest that you prefer women to your husband, and consider changing your life so he is not your primary relationship. The thing about looking for someone to do it with in front of your husband is that it takes you down the path into the world of kinky sex (and kinky partners, not everyone would be into doing it in front of a third party). If you want a pretty average, normal life, the kind where the two of you come home from work and talk at dinner and relax in the evening in front of the TV and all, kinky sex is not going to provide it. Simply acknowledging facts and getting into a satisfying long-term relationship with the right person will provide it.
you may need to be even more honest about your feelings and find a girlfriend. maybe try having a threesome....or if you want to really fix it more with your husband get turned on by watching porn right before you go to sleep with your husband