I have a sexual arrangement with a male friend. This has happily gone on for a few years but is entirely secret. I have told literally nobody and i have no reason to think my friend has either.
A female friend of mine has become increasingly friendly with my male friend. There is nothing sexual to it (she is happily married) but they are seeing more and more of each other, with me as part of the group. I feel slightly dishonest in not telling her the extent of my friendship with my male friend. He and I are obviously intimate in more than just a physical way, and whilst it's not a bf/gf relationship it is nevertheless more than she realises. When she mentions him I often know more or differently to what she says etc.
I don't like keeping things from her. She is a great mate. If she ever found out second hand it wouldn't look great and I would feel sad that it had happened that way. But on the other hand I don't want anyone to know about my arrangement. What would you do? I am tempted to keep quiet and risk it.