It WAS inevitable due to HER poor choices.
She may as well have walked the child into a pen of lions.
She welcomed a violent man into her house, knew he was violent, knew he was harming her tiny daughter. That would be bad enough if she did nothing. But actually it’s worse than that because she actively continued to allow him access to her daughter, alone, and did not protect her.
She had choices. She could have sent the child to her mothers (they were close), or the child’s father, called the police, ANYTHING. But she stood by and watched him
murder her 2yr old daughter.