She was enjoying it (easy to tell). I worked my way down her her arm to her hand. I was there for a bit and then she said “I have to go put S in bed”.
Are you sure she was enjoying it? Sounds to me like she was maybe just tolerating it, then when you got to her hand that was too personal and she excused herself. Just be careful, I think you're applying too much pressure to her. I know it's tempting but she's not there yet.