Pregnant at 38...

Harvetta
I am a mother of 5 kids 22, 20, 19, 11, & 1. Also a 2 year old granddaughter. Last time I was pregnant my kids was disturbed by it I think they feel Im to old to keep having babies. Just found out I pregant again. How should I drop this news on my crew? I was thinking of baking a cake and have it saying "Your moma got a bun in the oven." I want to make it fun for them..