[frubam]

Originally Posted by SoFarGone

chapter 12 is out.

Spoiler for ch12:

wonder who the mysterious caller is?

Spoiler for chap 12:

I wouldn't be too surprised if it's just an overreaction. Aren't they only half-siblings? That could mean that he was the other father their mother remarried. I could easily see this whole thing about her moving in with Sakuta being either her running away from home, or some kind of deal with this other father.

On the extreme side, she could be courting sexual favors, but I can't say I really expect that out of this series, given its shown content thus far.