My first wife found out about my bisexuality when I confessed to her that I had lost my virginity in a threesome with a bi-couple. At the time of the confession, we were separated (after 5 years of marriage) and on the way to a divorce. My confession intrigued my wife, and when she asked for proof, and I gave it to her (I had pictures), it led to the first sex together in 9 months....and then to our reconciliation. We remained married for 16 more years.
I've turned this experience into a story posted on Literotica that draws very closely upon what did happen, with some embroidery. It's called "Screwball Love: a Virgin, a Threesome, a Reconciliation."
I met my second wife through internet correspondence. I confessed to her in our first week of exchanging correspondence. I wrote to her that I had a dark side and told her about my few bisexual adventures and loss of virginity experience. She replied, "That's your bright side." (She too is bi, and she had a girlfriend as a lover for 6 months when she was in her twenties.)
