Miyako's going to go "before we continue put this blindfold on, it'll magnify the sensations" ones of these chapters, isn't she?
Also, this chapter pretty much confirms his sister is pregnant. I kind of suspected when Touko asked those questions and there were panels of abdomen focus (specifically where the womb would be). I'm getting kind of worried for Chika at this point though, same vibes are in the air like when Touko checkmated Yurika.
edit: gross, rereading this now she was totally thinking about her dead husband the whole time while getting banged too lol