i have just been parent helper and my god it was hard
not in sense of playing with children but because my own child was there ( and she played up royally because i was there ) i felt such a bad mummy as i was talking to her like i would at home , which is not harsh but more harsh than the telling off she would get from her playleaders
i was quite sharp with her but only her when she would not do as she was told so felt like i came across as a right ogre !

awww I think it's good that you still spoke to her like you would have at home it means she knows she can't play you up and I bet the other workers there respect you for not letting her get away with anything!