I used to do similar emails.

This could have been the convo:

Me: What time will you be dropping D off Saturday morning?

H: 8 or 9. Unless she wants to stay with grandparents

Me: I'd rather you just bring her home but let me know if she wants to go to grandparents. Thanks.

Me 57/H 58
M36 S 2.5yrs R 12/13

Let me give up the need to know why things happen as they do.
I will never know and constant wondering is constant suffering.
Caroline Myss