After helping him to the tub, Lily turned to Sirius as he pulled his shirt off, reaching out to lift it over his head for him without thinking. She caught herself and couldn't bite back the entire gasp that escaped her lips the moment she realized what she was doing, and quickly turned her head to the side, looking away from him as she held an arm out so he could support himself on his way down into the water.

Which was the only thing she had any business doing at all. If he seemed incapable of it, or if he asked her to do it, it would be alright to remove his shirt for him, but just taking it off like that for him was out of line.

She tried not to blush, keeping her head firmly turned, though the remark about her hair color was sobering enough to get her to respond.

"I'd like my old hair back whenever it's not too much trouble." Lily wanted her hair back right now, but she was a servant and he was injured, there were many reasons she couldn't just ask that of him.