We use her for occasional babysitting in evenings and have been paying her the normal rate £6.50 we pay for the day.
DH asked her about babysitting this weekend and she said that she checked our contract and that we should actually be paying £8.50 for out of hours.
I don't have a problem with this, but just wondering what the fairest thing to do about back payment as I have no idea how many times we've used her for babysitting in the past, how many hours, etc.
Any thoughts?