Hi you could give your dad the idea of taking her away for a holiday or weekend break instead.Saying she would rather have that as a surprise then a camera. Tell him a camera isnt personal enough and you think she wouldnt really want one that much. Or if your mum likes jewelrey, tell your dad she would love him to buy her some earings or necklace. Could you prehaps say you have been talking about cameras to her and she said she wouldnt really want one.? good luck please let us know how you get on, xx