I agree....keep waiting. I KNOW it is hard. It is even harder once they show a glimmer of hope. Right now he may see you contacting him as pressure....let OW be pressure right now.
While I think her being there will be a good dose of reality for them...I think you should prepare yourself for the fact that he may not break it off. I don't want to be a downer, but for whatever reason it seems they don't want to "hurt" the OW's feelings...(even though it was so easy for them to hurt us). Even if he wants to he may not get up the nerve to.
Just keep doing what you are doing. No contact was good before...keep doing what works. Just because you aren't talking to him doesn't mean he isn't thinking about you or your situation.