It's not clear if Miss Human intends to kill even the Marisa, so if she isn't murderous, this could be a case of "scare 'em straight".
Scare em straight? Reimu has no eyes, Marisa's being burned inside out, little Reimu's bow is ripped, and poor little Marisa had her hat reduced to shreds. This is a lethal attack!
So this human killed them because they pooped. I feel bad for any children she may have.
Nope, the human abuses (unclear if lethally or not) the children because they were born to a stray who refreshed without permission. I'm pretty sure the 2nd page is supposed to be the delusion of the blinded mother, and stabbing the shitting child is just another one of a line of abuses for the sake of abuse rather than as punishment.
This in itself is a morally questionable action, but probably not extendable to regard the hypothetical children of this throwaway anon.
can'd give birth...?ReimyuJet black mishter hat...*sob**wick**wick**sizzle**sizzle*YesssDo something!Little One is doing poo-poo a lot!*odor*Yuyu!I'm sure someday your sister will do something to Reimu and fix her eyes!But the reason why you can't see such a cute little boy is because you're picking up a mustache! idiom, I think?