How do you rate her reaction?

i wouldnt overthink it. I wouldnt overthink these things. She likely didnt know what to say because its not the easiest text to respond to, i would just switch threads. Or build on this one

It just seems like she's playing along but you really don't need to say you're reading a sexual book to sexualize the conversation lol. It's beta and unnecessary really. Just move things forward, telling her you're reading that book didn't do anything for you.