Okay so, Bow's anxiety to get touched stems from her abusive father. So my guess is that Teach used Bow's weakness to finally being able to get his hands on Mai. "She is always near Mai", he thought. So he gives Bow love and gains her trust, fucks her, throws her away because his main goal was to get to Mai. Maybe Bow's call Mai didn't answer was even way before it.
But yeah, nice domestic violence drama in this one. Even though the art and the bottle throwing made this very comical.