We are telling family at Christmas. The problem is, mt family is 800 miles away and we are not going there this year. Also, Jon's family does Christmas on Christmas Eve. My family does Christmas on the Sunday following Christmas so that everyone has time to travel home. That means Jon's family will know for a whole week before mine and that's going to set my mom off, but tough.
We are going to use the Christmas gifts for our moms. We are building Jon's mom this picture frame with clothesline rows across it and you use clothes pins to attach pictures. It's super cute. If I get an ultrasound, I'll add the picture. If not, we will figure out something else to pin up there.
For my mom, my sister and I got her a 31 bag that has stick figures of her grandchildren on it. So we will just say "To be continued" or something like that. Of course, I'll have to tell my sister ahead of time because she might get mad that I used our shared gift.