For you and anyone else reading this I recommend the book "the designer relationship" - its actually about polyamory but I think it does a great job solidifying the concept that really, a relationship between two people can be basically whatever they want it to be, not defined by social norms. What comes first is open and honest communication and negotating through hard conversations to find a way of mutually meeting everyones needs

FWIW my wife is bi and dates women, not that really ever bothered me but in no way has it ever been more damaging to our marriage beyond basic scheduling conflicts. I will admit I would have had a much harder time opening up to her being with other men though. Im lucky that she has never fallen in love and wanted to run away with one of em I guess, but partly thats because our marriage is otherwise great and shes already free to explore her gay side so why would she want to leave?

https://www.amazon.com/Designer-Relationships-Monogamy-Polya...