Well she most likely doesn't want to give her daughters upto that god. She's a mom. She had dreams of keeping her children a live. Sacrificing one is her nightmare.
There are about 100 better ways than doing that the way she did....
Don't forget that if MC
wasn't as stupidly powerful as he is, he'd be
dead...... And poor mommy wouldn't have batted an eye.... Didn't even when she thought he
was eaten by her foxy fox...
Before "being a mom" , she is a homicidal bitch. And the rest of the family is even
worse...
The answer should be "No!" , with emphasis, and some geographical re-arrangement of some historical traditional nihon architecture if they don't listen.
I'm not often in favour of the murderhobo option, but this lot of roaches need exterminating.