I know of nothing in the teachings of Jesus in which children are "hit" for the sins of our Fathers. Maybe you could ask her for some verses or background on this.
Instead, she should have told to you to find strength in Christ for the tough battles ahead.
It's a common misconception. There is a biblical reference to the sins of the fathers being visited on the children 'til the third generation. It doesn't mean what some people think it means.