It's one reason she can dismiss the idea that he wasn't looking at her because of that. But if that isn't the case, she doesn't know what else is bothering him, which worries her...

Still, the water feels really nice as he pours it over her, his hands even better. "Mm...We can put fresh water in for you, anyway," she replies, considering the blood. While she hasn't looked in the mirror to see, there is no scar on her neck.