sil never bothers with anyone all through the year not one birthday, not even a card, her excuse is, she has no money, yet she can afford an iphone, holidays abroad and in this country, weekends away, she has no dc's and lives with parents with her boyfriend. mil always makes up excuses for her, i just ignore the excuses now and don't make a comment.
so this year she has decided to buy her dad, [my fil] an expensive gift, checked with dp to see if he thought it was ok and went ahead and bought it for £200. i have to say i was very surprised she went through with it and bought said gift, anyway we have already bought our gift for his family which she knows, as i told her a few weeks ago what we had got, last night dp says 'oh my sis wants to know if we would chip in for the gift she has bought' i said 'cheeky moo, its about time she bought some thing, no we have bought our gift, it was her choice not ours, tell her to sod off' now he did not tell her to sod off of course although if she asks me i will tell her to, but no way am i prepared to spend even more, just to make her look good, we did this one year and got no thanks at all and all the credit went to sis, even though it was me that ordered it, paid for it and sort it all out, she just sat back and did nothing but smile 
[by the way, yes the sun does shine out of her backside in mil eyes 
] do you think aibu or not