Everybody Needs a Hug
Children can be a lot more understanding than we give them credit for. For instance, as babies, if a baby cries, all babies in a 50-mile radius will start crying out of solidarity. In this story, the OP was the child who needed a babysitter, and he was also the person that surprised his mother the most.
One day, after serving lunch, the babysitter just broke down and started crying. The OP had no idea what was going on, but he jumped out of his seat and hugged his babysitter with all his might. It turned out that a month prior, the babysitter had lost her father, and she was feeling particularly down while on duty.