Well it’s definitely cheating if you consider marriage a monogamous relationship. I have always loved the person doesn’t matter what sex they are. I’ve made a choice to be with men and keep my relationship with my wife in tact. I look at life as being too short. I want to experience it all. You may judge me however you want but I will never regret the men and women I’ve experienced that have allowed me to share their space. Why should we choose to make ourselves suffer to appease a god? Blasphemy you may say, yes but against who or what? Am I Catholic, Jewish, Muslim? Which god is mad at me? It’s all subjective. Love all, shun hate and don’t be pious when you know your not.
That is entirely dependent upon how she defines "infidelity". My ex was also Bisexual, and it wasn't considered "cheating" as long as you were really clear on the difference between "playmates" and "lovers" . My current wife has a much more traditional interpretation of infidelity, and monogamy is absolutely a sine qua non for her. She was crystal clear about that from the get-go...and is certainly worth the commitment.