We cooked Christmas dinner this year for 14 people in total. My parents have both died as has DH's mum so we had my brother, my sister and BIL, 5 teenage childre, FIL, BIL and BIL's girlfriend.
Also, DH was made redundant last month so we are a bit skint.
My sister said that she would buy and cook the turkey, she also made a trifle and helped with the table decorations. FIL bought the wine, BIL, crackers and sausage rolls.
DH and I cooked all the veg and accompiaments and cooked a ham.
I told my brother to bring a bottle of champagne and some things to heat up for tea (canapes, pork pie etc).
After lunch I put DS2 (10 months) to sleep while my sister, neice, DH and FIL, BIL did the washing up. My brother and his 2 children watched tv.
Whilst I was putting DSs to bed I told my brother that he wsa in charge of tea. He offered everyone a turkey sandwich but didn't do anything about heating up the stuff he'd bought (despite having to get passed it in the fridge to help himself to trifle). Never mind, noone went hungry.
THEN, yesterday, he pops in at lunch time to ask if he could have his stuff back as noone had easten it . My nephew had some mates round and they had no food in the house.
Was IBU unreasonable to tell him that he couldn't , and that it was still his contribition to Christmas Day even if I didn't ask if anyone wanted it