I've been with DP almost 4 years and have bought his sister something every year from us both. It's usually something I've spent time and effort (not to mention money) picking out. It's starting to get demoralising now as its never reciprocated. For 2 years out of the 3 I have received nothing and for one year I got a nougat and nut chocolate selection (I'm extremely allergic to egg and nuts).
I have no idea what to do this year. My inner bitch says get the ungrateful cowbag nothing but this might precipitate world war 3 and I don't think that would be festive. I don't want to spend lots of money on her either but if it's not considered to her standards she will bitch and be highly unpleasant.
I'm not materialistic and am expecting nothing again this year, but it's really disheartening to be snubbed in front of DPs family by her after putting the effort into buying her something special. I find Christmas difficult anyway as I'm NC with my family and especially miss them over the festive period.