(the situation might have been different had MBlume's girlfriend been in a primary relationship with him, at the time, because then Alicorn could have ended up in a "subordinate" position and I guess she woulnd't have enjoyed being the third wheel).

We were in a sort of pseudo-primary situation which wasn't working that well. She broke up with me just as Alicorn and I were about to start seriously talking about how this would work, so the point became moot (though it did trigger a lot of concern on my end over whether I might be rebounding).