That was amusing.
Just go back two chapters--you can see what Sherry said for yourself. What Sherry said about how she could kill Michio was in the same chapter as the one in which she demonstrated just how attached and loyal to him she
wasn't, especially compared to Roxanne; in fact, it was in the same scene. The author passed it off as being "logical" (so it was translated).
Regarding what I said about the author's favor, pay attention to the girls' appearances, to start. I won't say anything else here--I'm pretty sure I got the attention of lolicons (or their sympathizers) who think their fetish is under attack and believe knee-jerk "replies" with "dumb" stickers amounts to intelligent defense. Such people have a lot in common, I find.