I'm wondering if it is ok/weird/major faux pas to announce our engagement in Christmas cards sent to aunts and uncles? These are all people who will receive STDs and invitations when the time comes. I've only just recently met (most) of them - at a family wedding across the country from where my fiance and I live.
For various reasons completely unconnected to fiance, several of his relatives avoid the overall (large) family, so this recent wedding was the first time in years that he has connected with them. I'd like to build on the great time we had at the wedding, and start establishing those family ties - baby steps with Christmas cards. They don't all talk to each other though, so I'm not sure they'll hear about our engagement otherwise (i.e from FMIL), until they receive the STDs from us.
TL;DR - I'm sending family members Christmas cards, would like to share our news, but not if seasonal greetings are an inappropriate vehicle for it. Thanks for your help!