It's not a big moment. No, that's not quite right. It is a big moment, but it feels small at the time. Alaric thought that it would require more preparation. Not physical preparation—the servants handled that—but mental ones. Emotional ones.
Whether those additional preparations were meant to be more for himself or Lenore, well, Alaric didn't have an answer for that.
Instead, it comes up naturally in conversation. Lenore makes a comment about Alaric being more distant from his study and dressing room when he spends the night in her bedroom, and she wonders aloud if that causes issues for him or simply takes away from his already valuable time, leaving him tired in a way that even consistent rest struggles to resolve. He believes she was just trying to figure out if she's being too inconvenient or not by asking him to rearrange his nighttime routine around her.