Good for you GH, I am glad that you had a nice night. No matter what our spouses tell us or don't tell us. We just have to let them be. I know it is hard. We want so badly to trust them. I will read more of the books I got today (see my thread) and give an update tomorrow.
Your W may still be in contact with OM or not, in either case, if you choose to fight for your marriage, there is nothing you can do about it. Just leave her be and stop questioning her every move, I know this drives my H crazy. It makes him feel like he has to answer to and ask permission from "mommy". I do not ever want to be his mommy.
We both need to make changes, even more than we have already done. You said that you both agreed to honesty, right? So don't start treating her like a liar, that will put her on the defensive right away. Just my opinoin, for what it is worth...