Sayuri was grateful that he'd given in to her desire. She had been worried that it might actually come to the point where she would have to use her power as his master. As time has progressed, she'd let those lines blur since she had started to fall for him.
When Kenshin said he wasnt worthy, Sayuri frowned a little, but she wasnt surprised at the comment. It was one of the only things that frustrated her about him. "You think to little of yourself Kenshin. To me, you're worth all of my concern and more."