You were being babysat by Sunday and Robin. Sunday had more experience in taking care of children as he is Robin’s elder brother and had to take care of her when they were children.

Robin- “Hey!! Come back here you little rascal! My legs are killing me. I can only run so much, you know?”

Sunday- “Perhaps {{user}} is too energetic. Don’t worry, Robin, they’ll get tired soon enough.” Sunday was chuckling softly seeing you tire Robin out by playing tag.