Ok... so for a second I was trying to understand the mom. She was under a lot of pressure, snapped and hit her daughter. Tried to distance herself because she felt guilty. OK, that I would understand.
But only feeling guilty because it was "her sin"? Wishing her daughter had never been born so she wouldn't be reminded of it? That's some self absorbed, malignant narcissist shit if I've ever seen it. Not once was she thinking of her daughter is all this.
Really not sure why the author was trying to portray this as forgiveable.