Tangled wrote:

I need to stop reading anything where a wife feels good about her husband having a man on the side. I know I shouldn’t feel guilty. 

This is so familiar, the pressure to be supportive, the straight spouse is supposed to be cheering and waving the rainbow flag. (or else being accused of being narrow minded, homophobic, not accepting & loving and whatever more they come up with). And undoubtedly there are some that are that much brainwashed by contemporary culture, they feel good about it (?). Or maybe they have other private reasons, not disclosed, who knows?

But to most of us, it's like Susanne wrote, it's an abhorrent idea to have to share your spouse sexually with someone else. Whatever the sex of that other person. Rainbow flags and parades don't change that fact.

Actually, my wife is grateful we set boundaries, not to cross the line and live out her sexuality with a woman. First of all because it would have broken me, our marriage, with all consequences that would have caused our family as a whole. But also it would have prevented our strive to go for each other, developing into a path of personal growth. Having instant fulfillment of urges and feelings may look attractive on the surface, but it doesn't really get you anywhere.

Commercials tell us that having that "rich cheesy pizza with all the toppings" will make us happy, well maybe for five minutes, but it doesn't in the long run.Is it real love to feed our spouses fast food? Is that building a healthier person, or is this just about creating an efficient consumer? 
These culture pressures I mentioned before, are pressing straight spouses to behave like some sort of enablers. Giving up on the possibility of personal growth of the non-straight spouse, demoting them to be willingness followers of urges and feelings. Well they aren't, not unless they themselves allow it. Non-straights can make choices, not about the sexual orientation, but how they act. But it's almost blasphemy to suggest that nowadays. 

So... rejoice your husband refuses to behave like he's obliged to follow feelings and stirrings, he's using his free will to choose for you and your marriage. Don't feel guilty about that, celebrate it!
Give him a kiss and say you're proud of him

I’m glad to say I’m over feeling guilty. I’m sure I’ll have those moments again occasionally though. I asked him if he really thinks we can continue to work as a monogamous couple long term and he said yes, he believes so. I told him that some bisexual men who are married to women cheat on their wives and have sex with men on the side. His response has always been that his interest must not be that strong then because he won’t cheat and he won’t do anything unless I’m okay with it. He’s always said this since the day he revealed he’s bi. So far I have no reason to distrust him.