They are your child, if not you to teach them who else should? She treat them coldly and unlovingly, but despise her husband and sons if they do the same? If her going to treat her children like that, she should dissapear forever from their life. Let they live their live happily in their own way.
Okay, let' s stop this right here. Make this the last chapter, and next let's start with extra chapter. Maybe an alpha-omega version with lots of baby as cute as baby yoomin.
It's scary..