I want desperately to tell her that as long as he is in the picture, I am not. But I think that would be extremely counter productive.
That is a boundary. One that you cannot bend on, once you both establish that boundary. And that is going to be a hard one to swallow. Be sure of her attitude toward you before issuing that particular ultimatum to her. You have to be able to back up your words.
Experience is a brutal teacher, but you learn. My God, do you learn. - C.S. Lewis
Life is usually all about how you handle Plan B. - Jack3Beans
Listen without defending; Speak without offending - FaithinAK