Time to let go......how?

[otw]

So w comes home from meeting with counselor and tells me it is not what she expected. I said well I don't know what you did or expected. W stated I thought she could get the agreement done for us. I said she can help us put it all together and come to terms then we need it legally drafted and filed. I finally told her just go through everything and put together what she wants to do and then if I agree we are good to go. I said nothing more on the topic and acted as casual as I could. So I will be waiting for her to give me her terms I guess. I will carefully go over then also have my attorney review. Even though this part is hard to deal with emotionally, I am trying to focus on a bigger picture. My kids being happy and myself. I wish w to be happy as well but I am no longer a part of that. I can be polite and friendly and a nice person to her but I must have priorities.
As far as me going away for the weekend, I told the kids last night at dinner before wife was home. D7 said I don't want to be stuck with mommy for 2 days and s4 started crying.
I am not sure if I should tell her about the children responding this way about her. There have been many other times as well. I don't want to look like I am using guilt in our situation either. Thoughts?