That can be a tough situation, but I'm glad smallsteps had a lot of fun! My two boys are generally pretty easygoing when we're outside. We recently watched a good friend's child who had no fear of running into the road, and it definitely gave me a bit of anxiety.
She is the sweetest little kid though and my two boys dote on her constantly.
It is hard to look after other people's kids, especially these days. There is a wide variation in parenting, and everyone expects to have their style catered for. I am just happy if no one gets run over.