I know I am being extremely petty and this happened a while ago which makes it even more petty to think about it now but here goes:
My DHs family were clubbing together to buy a present for his sister. Spa day experience or something, I can't remember.
We were at his brother's house as we discussed it. Present were me, DH, FIL, BIL 1, BIL 2 and BIL 2's girlfriend, now wife.
So I said "right, the cost is £200 divided by the 6 of us is £35 each (or whatever it was)"
I was not being bossy, I just happened to be the one that looked it up.
BIL 2 said (snapped) " hang on, my GF shouldn't have to chip in".
I said " sorry, yes, right you are, total each is £200 divided by 5 = £40 each".
We agreed to transfer the money to whoever was putting the thing on their credit card.
Then the birthday card went around. And BIL 2's GF signed it!!
I said nothing but AIBU to think if you are making a point of not chipping in, then your name shouldn't go on the card the voucher will be in?!