A) Tomorrow I'm due to have the kids all day. W said I could only see them later in the afternoon. I was polite. calm but firm to say that it was short-notice, I had plans for them, and she should respect that what we do on days without her is up to me.
B) She said she wasn't able to collect them on time today as she will be late. I asked if she would mind the kids staying longer with me until she arrives as I wouldn't be seeing them next week (as W and IL's are taking them away). I asked if it was possible for them to stay the night. She said she would speak to her parents. FlL arrived to collect. He said he hadn't spoken to W. I suggested he called her to see if possible for kids to stay longer. He asked if I was refusing him to take the kids. I said no, he drove off. Kids are still with me.