Hey Blackie, I think you are at a really critical stage right now. Whatever you do, put on a happy and loving face tonight. Even (and especially) if she tries to bait you into a fight tonight.
She is going to be testing you to see if she did the right thing by cancelling it. Don't give her reason to doubt her decision. Do not give in to the temptation to think about who is "right" and who is "wrong" here. Take the high road and be thankful and loving. The time will come when she will know and understand what she has done.
I never went outside my marriage but I can tell you that there are many things that I feel guilty about, in regards to how I treated my husband. I can see clearly now the things I did to make things worse between us. I couldn't then, though!! Give her time and be so awesome and loving that no one would be able to resist you.
Have a very tall glass of whatever your fancy is for today and put yourself in a relaxed and cheerful mood. Maybe even pour one for her when she gets home and toast to a new start.
