Today, I'm meeting W who will be with the kids at a certain time and place where there's an open-air event with food stalls etc. Is it better if she arrives first and waits for me?

My plan is to get some food near to the start. I know she would refuse if I offered to get her any (so I won't offer) but she'd might offer to buy me some - not sure if I should accept (i did last time) or say I will buy my own. Think I will buy my own this time.

I expect her to leave the kids with me at some point and for her say 'this is your time to be with the kids not us' (it hurts when she says that but now I'm feeling better prepared to expect it) and for her to then walk off looking at things on her own and talk to our mutual friends. Kids will then get annoyed as they will see her around and want to go over to see her etc.