I thought about posting this in AIBU, but it might be a bit more nuanced than AIBU normally allows for! Anyway...
A few years ago, for her 50th birthday, my father bought my DM a very expensive ring from a range by an upmarket jewellers. We had a trip to London to pick it up and she was over the moon with it. My DM's birthday is at Christmas time, so it was a joint Christmas / 50th bday present.
This Christmas, my father wants to buy her a pair of earrings to match the ring. These are not cheap and will be 4 figures at least, depending which ones he goes for.
I know my mum will be very upset if she opens these on Christmas morning. My parents relationship has been struggling hugely the last few years (I am personally of the opinion that my DM should leave as she is so desperately unhappy :( but I cannot make decisions for her). My father is of the general mindset that as he earns the main chunk of money then he rules the roost, and will often use extravagant gifts or paying for things as leverage to get what he wants later or as an excuse not to pull his weight. This was (is) common behaviour throughout my childhood. His behaviour is very bad towards my DM at the moment and I know these earrings will be an attempt to assuage his guilt and attempt to keep her on-side (he would truly be royally fucked if she left as he is completely dependent on her).
My parents have jointly agreed before that as they really have what they want already, they will not get each other any presents for Christmas or birthdays. My DM will feel so awful if my father presents her with these on Christmas Day and she has bought him nothing (my father has done this before, it wasn't such an expensive present but I remember my mum being upset).
My father has shown me the earrings several times and asked what I thought, and every time my answer has been "You need to talk to DM before buying something like that" - but as he has said, he knows she would say no.
I have an awful feeling he is going to buy them anyway, and sometime in the next couple of weeks I will get a phone call asking me if I can go to the jewellers to collect them (I now live in London).
I know my DM would love to have these earrings - IF they could afford them and they weren't trying to save money, and they weren't being sprung on her by my father in front of an audience (exacerbated this year as it is the first year my partner will be with us for Christmas; normally it is just family). Under those circumstances, she will not want them.
If this does happen, WIBU to refuse to collect them for him? He has a temper and having grown up with him I am almost programmed to do as he says - it's ridiculous and I'm working on it, but there's still a small part of me that's terrified of him and I will end up doing nearly anything to avoid confrontation. Unfortunately I think he knows this and will pressure me. Or he'll get my (well-meaning, but emotionally oblivious) brother to do it without my knowledge.
If he DOES do this, would I be completely out of order to tell him I am not collecting anything until he has spoken to DM?
I suppose my dilemma is that I am almost certain this will upset my mother, but I still have a nagging worry that maybe I've got this all wrong and it would be lovely and I would be mean to refuse to help.