You stated "don't buy her anything." What about Christmas?
I promised her a Nano to replace the iPod her sister broke. If I go back on that promise, don't I make her worse?
If I give gifts to her sister and not to her, doesn't that just confirm her attitude that I do not love her as much as her sister?
This is the basis of so many of our problems. Sigh.
I'm always trying to prove (to her and everyone else) that I love her as much, that I think I end up over-compensating. And nothing is ever enough!
