He (27) and I had been FWBs for some while. I am married and my husband is aware and we both used to be colleagues back then. Then his marriage was fixed by his parents.

We decided to have a talk with his wife to be (24), because we felt like she deserves to know irrespective of how it was going to turn out. So all three of us met one evening and we conveyed to her what was going on between us. She was understanding and didn't saw this to be something offputting. Me and my FWB had stopped having sex after that, until he said she asked him some days later whether he is still active with me or not and he said no, to which she said he can and she doesn't have any issues with this as long as it's strictly sexual and between just the two of us.

And with that, we resumed having sex. Continued till his marriage and continued after that as well. She is now like my little sister and we all are so close and tightly knit to eachother. They are going to be parents soon and we can't wait for that. Overall, this is a relationship based on friendship and genuine care and affection for eachother without the element of jealousy, with them, the couple, getting the first priority.