Well thank you everyone for the positive accolades about the birthparty thing I was so nevous about.
A caveat, however, it was still very very akward. On the day of the party with all of his class mates, it was just so stiff feeling for me. Especially since she brought her two friends there that I was not expecting. I felt out numbered. These two friends used to be our friends, our two main friends. So there was that. I was polite but we didn't interact much. I didn't interact much with W at all either, just kept my distance and kept busy.
The next day, it was still very akward. I mean this is the woman who gave birth to my kids, the woman who shared every waking moment with for 20 years, the woman I married 3 times. And now, it's just silence.
However, maybe it's in the perspective that I should count the wins. We did not argue, she did not go into Monster mode, and it was peaceful. So I guess I will count those as a positive, even though they were small ones. Our S10 asked if we could all get together for a play date at the park to race his new cars. I just said "We'll see buddy, they sure are great cars". W had no comment.
I hope that one day the awkwardness dissapates. Maybe I should make that a goal too, actively work towards diminishing akwardness on my part and to be more "go with the flow" kind of person as long as it is within my boundaries.