(Toshi's also aware of his movements [She can hear him, she can smell him], but she'll probably assume he's a wolf running for its life. So unless he doesn't lurk around too much she won't grow suspicious.)
Seeing her clothes looking a bit soiled, from the battle...
Toshi - "Hey, Sakura! You don't mind if I use your bath, please? I'm feeling a little dirty all of a sudden." a bit of worry goes through her mind thinking that she may have the tainted blood spilled on her clothing, getting the feeling it may eat away at her clothing.
"Oh, and can borrow some of your clothes, in the meantime?" realizing she never came with spare clothing, with her.