I know that she wasn’t approved to have Preston in her care/overnight at first, because it was mentioned somewhere they were glad she was now approved coz they wanted a night outIt depends on how regularly she saw him too, but I'd say she should have been more vigilant anyway knowing they had no prior experience before Preston moving in. Did she not notice Preston flinch or begin to lose his smile when JV was with him?
My mum would have been asking where any bruise came from on my kids, an arm in a cast and she'd have been questioning me like a police officer. Having 6 children herself I'd have expected her to be more on the ball.