Hi all, I hope someone can provide some suggestions. My wife and I have a 3.5 year old girl. There is also a 16 year old stepsister from my wifes first marriage. Although the two get on well, the 16 year old has gone through an anorexic, bulemic phase and can be very on edge and has been given to hysterics. She has refused counselling, but is generally calmer at the moment. She is though, more infatuated with her iphone and social media messages than most events going on physically around her. My wife wants to rely on the 16 year old for childcare as she has recently taken up a new part time job. I have said I would prefer to limit the periods to 2 hours, as I am not sure any longer is appropriate. This includes childminding at home and trips to the local softplay area. Am I being unreasonable ? I think the risk is relatively low, but if something were to happen through lack of attention or through any normal accident, I just dont know how the 16 year old would deal with it and then what will happen if authorities were to become involved. Please do you have any perspectves or advice ? Many thanks in advance.