"I don't remember showing something i hide most of the time" Damn, how little your memory is ? Also even if she is just kidding, why her second option was "sex" ? That's rather dirty thinking.
That was heckin fast translation. I'm following this manga with the pixiv comic app but chapter 13 was already translated and uploaded here before I even got the notification that the new chapter was up. It actually notified me just as I finished reading it.
Fuu knew they're succubi, but she doesn't seem to mind (well, a bit blushed and embarrassed) being sucked by the two of them at the same time (threesome handholding from chapter 4).