I did set it. I think I'm going to approach it a little differently - instead of standing over W and barking demands, I'm just going to reject any invitation or time together, period. She'll want to know why, and then I'll give her the reason, and move on. To me that's a better way to show a boundary anyway, because it's less about control and more about your own actions.
For example, we're supposed to go to an anniversary dinner on Saturday. If she hasn't done the no contact thing by then, then we won't go.
I also responded to the Thanksgiving thing, and told her that sounded interesting, but wouldn't happen if the no contact text wasn't sent.
She said, "I will send it." So, I guess we'll see!