I'm not sure what to expect... I actually WANT to meet her, and he tells me I will love her when I get to know her. My concern/fear is that she will decide she cannot accept his poly nature and choose to leave the marriage, whether or not she and I get along.
While he and I both prefer all parties involved to be poly, I chose to get involved fully knowing that his wife is still on the fence, and most likely going to be mono to him. I am ok with that. He loves her, and I know he'll be hurt if she chooses to leave.
Sex between a man and a woman can be absolutely wonderful - provided you get between the right man and the right woman. ~Woody Allen