Finally got around to reading this chapter. Hooray for Claire showing her dere side! The ending's another pretty big change from the novel - originally, Rei didn't interrupt Thane's headpats. But in this version, not only does Rei accidentally clam-jam Claire, Claire doesn't even get mad at her at all, Claire lets slip how worried she was for Rei.
Between this and the end of chapter 7, the manga does seem to be having their relationship progress slightly faster than the original source's slowburn, though it's still probably too early to tell for sure. Either way, I'm all for it.