Announcement Dilema

Em

My SO and I are finally telling everyone the good news! My mom already knows and we're telling his family this Thanksgiving! The issue is how I'm going to order telling my father and sister and grandparents! 🙄

We're driving up to see my grandparents this weekend and plan to announce this baby girl to them! I feel like protocol dictates that I tell my father and sister before my grandparents... but I have serious concerns that they'll spill the beans and ruin the moment with my grandparents. Any advice?? Has anyone else had a similar experience so far?