If your partner has a same‑gender affair, does it feel like cheating?

So, my ex, not the most recent one, but an ex of mine, was a bisexual woman, and I knew that about her shortly after meeting her. During the time that we were seeing each other in the beginning, but before we moved in together, she spent some time with a girlfriend of hers who I had met and actually liked. It didn't bother me one bit. When we finally moved in together, sometimes when I was out of town, her girlfriend would come over and spend the night with her. Again, I welcomed this because I liked the girlfriend, and their affair didn't bother me at all. I did not feel threatened by it. Before you ask, the three of us did not sleep together. I don't think it ever was brought up, actually. You had a situation similar to this, and if so, how did it work out for you?

If your partner has a same‑gender affair, does it feel like cheating?
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