This series is so confusing. Has all of the recent chapters been one long flashback? Because the siblings were living the married life at the beginning.
I get it, he one single thing that she always wanted to do, he can't, so he isn't able to do nothing to compensate for this. When he moves will be to do what he always wanted, fuck his sister.
Glad the friend literally knocked some sense into the brother. I feel bad for the siblings but the bro is such a wimp. His asshole boss was at least right about him being empty.