Ah! I know this one. Me and my first wife. Who thought she was bi (but had not met the “right guy”) until she married me. She had not had sex with a guy until we got engaged, and I had not had sex with anyone until then (I was 31 — I wanted to wait until I found someone I loved who loved me, and yes, that’s how long it took), and while things in the bedroom started well, before long it all fell apart. She found sex with a guy was okay but not great, and I found sex in general was okay but waaaay too much effort for a minimal payoff (I faked orgasm every time we had sex, it was just easier). We officially divorced before our two year anniversary, but really, the marriage was doomed from the beginning — one needed satisfying sex, the other was happy with decent cuddling.

Still friends, still love each other. My (2nd) wife and I got invited to her wedding to a wonderful woman (who shares a number of similarities to me, but without that pesky Y chromosome) and they are enjoying retirement together, as are me and my wife. Happy ending!