Since I didn't read the other replies this may be repeated.... It sounds selfish to me. My birthday was just 2 weeks ago. We don't have scads of money right now. I could have asked my DH for perfume or a night out on the town or whatever and he would have done his best to do that for me. But instead I asked for things I legitimately needed and that I knew could be accomodated in our budget, which this year I needed new winter pajamas, slippers, and socks. Guess what I got? Winter pajamas, slippers and socks. I feel that it would have been wrong of me to demand more than that under the circumstances. And I think by being centered more on my family as a whole and not myself, I was rewarded b/c my mom sent me a really nice gift of parfume for my birthday, which I really wanted, but didn't ask anyone for. (Does that sound wrong? I hope not. I don't mean for it to. It is simply what happened and my take on it.)
My parents are the same. My mom needs a new washing machine and dryer. She will probably get in December or January as part of her Christmas gifts and everything else she gets will just be a couple of small things. My mom has asked for and received a lawn mower, a weed whacker, a new car, clothes, shoes, and various tools & household appliances. My dad has asked for and received clothes, shoes, jackets, a new car, smelly good stuffs, socks, unders, etc. It's not weird. These were things they wanted AND needed and were tickled pink to receive as gifts.
At some point in your life you start to realize what is important and the rest is just stuff. Sounds to me like your sis isn't there yet.
The whole point of turkey is to get to the pie.