Damn, I figured that Motoko's mother had been hit by a truck, but that I did not expect. Way more harsh than I had imagined.

With the rumor going around about Motoko nearly killing another girl for trying to seduce her boyfriend, it might be a more hostile environment for keeping HiFuMi secret. I guess Hibiki is taking over as the primary personality in the meantime. That will probably work in her family's favor, since various people in the school will start to suspect something and keep her at bay, increasing the alienation she feels. Fujiko obviously thought about the advantages, and the others were attracted by the idea of not hiding themselves. Of course they don't seem to recognize that that is precisely the kind of environment they get to be in when they are with Kosukegawa, Izuru, and Ginga.

I sincerely hope they don't take Sumire up on the offer, that would be totally lame. Maybe only go to see her grandmother to reject the offer.