That is dangerous. Flip flops should never be used on a bike. I had a badly bruised toe from doing that, fortunately not on a road. You could lose a hell of a lot of skin if you fell and skidded across a road surface. She is putting the child at risk.
The stupid bloody woman does not have a helmet on herself silly cow! It sets an appalling example for the children and you see it everywhere.
If she falls off and bangs her head badly the poor child could be sitting about with an unconscious mother.
I think cyclists should be fined for riding bikes without a helmet when with their children. It's like not strapping them into a car seat.
What happens when she goes over a bump? The child could bite her nipple off.