Hmm... Well, she showed me the card, told me she hadn't even read it yet... When I saw the 'new years eve party at our home' bit, I told her because I didn't want her to find out on NYE and ruin that for her as well...
Basically, it's not like I'm pushing this topic every week, this will be the first time I'll try to have a conversation to try and find out what it is that makes her so mad.
I think it is worth it because she really sounded like there is something I don't know which I should know to prevent me thinking that what the neigbors did wasn't so bad