Private
Well, first my relationsihp was with Aedan, and Sherr was.. well. Friend with benefits, as they say. While Sherr and Aedan were also a couple. Short time after, Aedan offered the idea that the three of us date each other. Sort of like a triad? Each of us dating the other two. Of course, we'd had threesomes a few times before, so this was more of the same, only more serious.
We also had a tradition. For each of our birthdays, we get together for birthday sex. Each of us individually with one of us, while the 3rd watches, three times, and then the three of us together.
But after Sherr's kidnapping, he and Aedan drifted apart. Broke up, I think, it was assumed as much by Aedan anyway. And as sort of a chain reaction, I wasn't with Sherr either. Mostly because it might hurt Aedan, and also - if Sherr was interested in keeping me, he'd have told me. So for my side, more of a nonverbal break-up (which I state is only the result of he and Aedan splitting up first). As to their thing, Aedan can tell you about it.
Oh, and just recently, my fiance Aedan broke up with me without telling me anything about it. I found out in a network post Sherr made, in a convo between him and Sherr. Instead of being told directly and.. well, if you ever offer Aed a job, just don't ask him to be an messenger delivery boy. You'll be disappointed.