Let me preface this by saying the polyamorous way of doing things is not my proverbial cup of tea. I'm in the same boat as gem: when I am with a man I want to be the most important person in his life, as I know he is the most important in mine. If for whatever odd reason J-Go and I thought to bring another person into the sexual mix, it would be as a plaything and not a partner. There's an important distiction there for the both of us.

Now, the point of that is not to say that a two partner relationship is the absolute and only way to go. The point is simply that there are playthings and partners, and everyone in a relationship (whether there be two of you or two hundred of you) better damn well know the difference, and better damn well know their role. Has your Master made this clear to you? Has he made this clear to his other sub? If he harbors any delusions that the three of you will be one big happy trio, he needs to address this right away.

Frankly, the only multiple partnerships I have ever seen work well are the ones where the people involved all love each other; not the ones where you've got two people trying to love the same person and not really caring about or knowing each other.