Grandparent in law passed on

I'm a free thinker but with a taoist background. I think this is more of how much you personally believe in pantang, and the social pressure from the relatives who believe strongly. If you can, just excuse yourself with a "I'm not feeling well" if it's awkward to share you're pregnant. For me I'll let my parents know and they'll prob be like "attended already bopian la, just don't go the rest, nvm la people won't care one" If this is going to be overhanging your pregnancy and cause you extra stress, just check in with the taoist priest or temple after to see if they have any advice as to next steps. At least if you have some aunties that remember you had attended a ritual when you announce your pregnancy and start gossiping you can shut that down.