That seems completely bizarre. For years I entertained my family on both Christmas Day and Boxing Day. One of my cousins always kindly sent me a generous cheque towards the cost and I was always grateful.
These days, we have Christmas at absentdaughter's house. I have in the past provided the money for a turkey and a ham. This year I packed a "victuals box", including wine, dips, pâté, cheeses, crisps and other nibbles (plus cigarettes, but don't tell anyone), separately sent over fizzy wine and liqueur chocolates, and baked quiches. We automatically assume that we help out each other; nobody keeps accounts.
We're into Oscar Wilde territory here: knowing the cost but not the value.