Honesty with your partner
I have a different perspective on this topic. I am the "designated" hook up for 2 bi married guys. In both cases, they knew I was gay and I was friends with the couples (we are all nudists) before we started getting together. The wives are aware of our sexual relationship. One guy is quite a bit younger than me. He and his wife actually invited me to their home for him to "explore" his bi-curious feelings. The other guy is older and his wife has little interest in sex. I live in a rural area with no close neighbors so I offer them a private and discreet place to enjoy nudity and sex. I don't know, or care, if they share the details of our sexual encounters. I'm just very happy to help them out, especially knowing that their wife's are aware of our relationship.
Gf encouraged I explored and seemed happy and excited I was open to the idea. She decided she didnt want to know details and to be honest there arent many to share. Especially recently. But when she has asked I have answered honestly.