Hi, This may be too late now but IMO I think you should decline, mainly for the same reasons everyone else has given. I would also like to add however that you and your friend should feel proud of yourselves that the ward sister felt you were advanced enough to be able to ask you to do this. Regardless of the money/responsibility implications ward managers aren't daft and you are both obviously respected enough to be asked. Well done! Decline but decline politely. :)