I already have talked to a couple friends about the situation whose confidence is without question and have been giving me some support if only a shoulder upon which to cry.

I guess I really mean "confront" rather than expose and have the conversation with her. But the MC still thinks that her doing a self-confession is much better for the R than confrontation. I will say that the MC has been a fantastic coach and has kept me from "jumping out of the closet" and EXPOSING them and has been completely correct about her slow breakdown in the sessions.

No. We are not intimate any more. I could not do it without a condom and that would really suspicious to her to say the least.

This is without a doubt the hardest thing I have ever had to do in my life. I am watching my best friend self destruct in front of my eyes. Some days the turmoil in her addled mind is oozing out and I vassilate from pained empathy to "serves you right!"