Don't worry about doing this perfectly. So you missed an opportunity to validate. That's no big deal. Do better next time.
As for your list, go through point by point and address how you will handle each one of these things:
Half asked questions that leave you hanging? Simple. Ignore. Same with half-answered questions!
Her continued dishonesty? Be prepared for the emotional pain this is going to cause you. Let it go, walk away. W knows you know about OM and you are SURE this is an A? Then it's OK to say, "please don't lie to me". And then walk away.
These are just ideas. You should come up with your own game plans.