When's Nadia's birthday ? Was it possible to prep her during her birthday that Maya wasn't getting gifts, but when it was Maya's turn, she would be the one ? Perhaps she was too young that it couldn't have helped... ?
That is a sibling thing I've never had to face... I remember a birthday party when I was 4, but I don't remember presents. I remember my grandmother bringing old reel movies over and having a bunch of my friends over to watch them and a huge cake, and the fun cartoons... but I don't think I even have pictures of any gifts till later... like when I was 7.