I think the line that sent the muse spiraling was;
"Ah, do you know what it means.. to love you."
And I can see Yui asking herself that same question, especially with Hyuga's -duties- and the whatnot.
So that will be my project when Kuro is offline today. Which reminds me that I wish her happy thoughts while she is at the dentist. ^_^ And send them to her!