Mrs. Charles insists that there’s a clear, moral reason to intervene: they will, on some level, be responsible if Shayla’s dad kills her mom. This suggests more broadly that keeping people safe is a community endeavor. Monday’s insistence that Shayla’s dad definitely hit her mom raises questions about how she’s able to say this with such certainty. It suggests she might have firsthand experience with abuse (and can thus recognize the signs of it), which Claudia has indicated is true in the “October” chapter.