Dear T,
Getting kind of triggered by H snapping at D for what to me seem like anxious thoughts. Yes, she has no reason to think she'll have a substitute teacher tomorrow, but it's happened fairly often this school year, so I can understand why she'd be worried about it. I don't think H understands that. But it makes me think of my parents when I was a kid. I'm sure I'm not making it any better by kind of snapping at him, but my instinct is to protect her (and my younger self).
Love,
LT