I have an acquaintance who's asked me to look after her 3 year old most Saturdays from the hours of 8am until 5pm, in her home. She also would need me to stay overnight in her house once a fortnight when she works until 4am. I would have to do everything this entails (preparing meals, trips to the park etc etc). She is calling this babysitting and it's just got me wondering.......surely this more of a nannying role? What's the difference?