I have a lovely auntie and uncle who are millionaires.
Every year they give us a cheque for £100 at Christmas.
One year I bought them a gift back for about £100 and got a nice telling off from them as they said we should keep our money and not feel obliged to return the gift.
I always write a thank you card but am thinking of getting them a cheap thank you gift. Like a plant or something for about £20
What is the correct etiquette in this situation?