I would appreciate help formulating my statement of boundaries. I just said that I couldn't make it to airport because of work. I'm planning to do a more general statement of boundaries tomorrow, something along the lines of:

I am not willing to live in an open marriage and I am not willing to live in a marriage where you have an ongoing affair. Only you can decide what you need in this life, and likwise for me, so it looks like we both have some decisions to make. I will be giving you some time and space to figure out what you want. I have a marriage counselling appointment booked for next week, which I will be attending and you are welcome to come if you think it will be a help to you.

Does that seem ok? (Thanks to starsky and others for some of the language).