I just wanted to add some (((hugs))) as I have been in a similar three way relationship myself, and I know how complicated it can be.

Always remember that just because you are submissive does not mean you do not have a voice. Any good master or "sir" will ensure you are well cared for while treating you submissively.

I would ask yourself if you are happy with the current situation, deep down, and then bring it up to your Sir so that it can be discussed. How do you feel about having a submissive male to meet your sexual needs?