Yes thank you. I think that was a point in my head but I just didn't know how to express it. I am going to write another draft
Ok, I think you have it, but let me just clarify. There are two different possibilities: 1. H, you can have S any Wednesday you want, I just need 24 hours notice, please. 2. H, I don't care if you give me 24 hours notice, three days, or two weeks, Wednesday is mine, please don't make plans for S that afternoon.
There. Much clearer to me, anyway. And it matters which one is your stance, two very different conversations with H.