What would you do?

I've had a close family member recently lose her baby. My family still doesn't know I'm pregnant and we had huge plans to announce during a holiday party with family and friends. My family member is still having a really hard time with her loss and I fear our grand announcement, or any announcement at all during the holidays, will really trigger her. I know my family will be so excited about my pregnancy abd probably won't stop talking about it and I want to respect her feelings, we haven't really processed her loss yet as a family. At the same time I have been so excited about these plans to announce. I don't know what to do and that it'll be hard to keep it a secret past new year.  My family is so important to me. What would you do? Or advice would you give me?