You know when a 15 year old has pocket money/allowance and she starts to earn a bit of money by baby sitting do you still give her her normal amount of pocket money?
My dd went almost apoplectic when I suggested she shouldn't get her usual pocket money because of this.
Then I thought, if I didnt give her the money there would be no incentive for her to do any work at all. She has had a flurry of babysitting requests in the last few weeks and has earned £80!!
The problem is it is not regular and she might not be asked for months.