Dsis is 24 and just graduated from uni. We were all (parents, Dsis, my DP and ds) supposed to be going out for dinner to celebrate the night of her graduation however she booked the table for 8.30 which was too late for us as my DS is 18 months and the uni and city is approx 2hrs away so would be too late to take DS all the way there for dinner at that time and back again. After a lot of to-ing and fro-ing we came to the mutual decision that we'd all go out for another meal when she comes back home to live shortly.
My dad called the other night to see if I'd got Dsis a graduation card and tbh it'd completely slipped my mind. I text her on the day to say good luck etc. I'm normally the type of person that buys people cards for everything and I'm usually pretty much on top of it but it never even crossed my mind. My dad was annoyed with me and pretty much demanded that I go and buy one.
This normally wouldn't be an issue but my sister never even bought her nephew a first birthday card or contacted us on the day about it. There was absolutely nothing said by her to us at all about his first birthday and still nothing to this day.
She is quite entitled and totally wrapped up in herself. Whenever she deigns to visit (lucky if it's once a year) we're expected to drop everything by her and our parents.
She's never had a job whereas I've worked in some capacity since I was 15, our parents paid for her to go through uni for the past 5 years (i paid for myself) and now she's going the length and breadth of the country this summer visiting festivals (bank of mum and dad).
Hmmm, this is turning out to be more than a issue about a card, isn't it? 
I just don't like to be made out to be the bad one when when she's no angel!
I should buy the card, shouldn't i??