Every year for the last 4, we've all gone to my Mum's, because she has room for us all to stay, and my brother in law's Mum also lives in Leicester and can come for the day.
Every year Dot (bro in law's mum) offers to pay for the Christmas pudding and a pork pie.
This year, she'd rung my Mum several times (including a few times in one day) to check that Mum as going to buy these items, and she (Dot) would pay her back for them. Yes, said my Mum, that's fine, I'll get them.
She turned up on Christmas Day, with pie and pudding...

So we had spare!
Also, NT is lactose intolerant, so Mum got him a carton of Oatly cream last year, while the rest of us have a dollop of Creme Fraiche. The trouble was that we all said "Oh, can I just taste that stuff?" and it was so nice, we wanted his special stuff instead of ours! This year, he guarded it more jealously!