Will summarise but long back story and very identifying!
Sis & BIL have asked XH to be DN's godfather and obviously invited him to the christening. Christening will be attended by a large number of family who have largely not communicated with me in the 2 years since XH and I split (I initiated it). I know during this time they have been in contact with XH. Was NC with Sis & BIL until 3-4 months ago for same reason and has been hard work getting back to having any sort of relationship. I'm now PG with DP's baby, who is not invited but that wasn't an issue until I heard about the godparents.
It's XH weekend to have our DD so now I have to go to christening alone and PG with my NC family there, as DD will go with XH and they'll all play happy families.
AIBU to consider attending church then having DP pick me up to go home and cry and not attend the niceties after where if I fail to hide the fact I'm 6m PG I will no doubt be told I'm being insensitive to XH whom I left?
They did ask if it was okay but I didn't say an outright no as then IABU so I made it quite clear that I thought it was innapropriate and that clearly didn't sink in.