It's not much later, in Isabella's room, that she asks:
"So... is Alex really a dom?"
"Mm-hm. Besides, I never really got used to the taste and don't need all the cream and sugar."
"I can take it or leave it. Sleep has never really given me trouble, I do need it but as long as I get a reasonable amount of it more-or-less daily I can function well during the day."
"It helps but the house'll settle or somebody'll be up using the bathroom or it'll be windy or a dog'll bark or the air conditioning'll come on or something."
"...the house'll settle? You ever think of getting noise-cancelling headphones or something?"
"I wear earplugs, they just don't help that much. You figure out how to sleep with headphones on and I will be eternally grateful except not in a way requiring me to do anything."
"I wake him up, not the other way around. It is possible I have never seen Alex actually asleep when he wasn't really sick, which might affect things."
"Huh. I suppose you could, like, put a camera somewhere and record yourself sleeping?" he asks Alex.
"Well, I could deafen him at bedtime and fix it in the morning, but it'd be pretty useless as a skill otherwise. Not sure what other angle I'd take."
"Magic is pretty opaque to me, but this doesn't particularly sound much different than somehow figuring out what counts as nightmares and then making me not have them."
"Sure. But I wouldn't be able to do anything else with the skill without advertising to light sleepers that they totally want this service."