M.C.
Hey I know how you feel. We are 26yrs old and have a 6yr old 4 yr old and 10 mo old. the first two times we told our family's about pregnancies we got not so fun responses. Which made me more scared then anything to tell them when we found out we were pregnant with our third, and we were in a tough situation my husband lost his job 1 week before we found out we were pregnant and we moved halfway across the country to live with my inlaws till we found another job. So pregnant and jobless we caved and let them know. We had our two older ones make cards, one pink one blue and on the bottom it said (for our oldested a girl "I'm a big sister again" and for our son "I'm a big brother....not joking!") they loved it and althought they were not jumping with excitement they did not give us the negative reaction as they did with the previous two. I guess what I am saying is you might be surprised yourself.
I would suggest not giving her this new at her job just in case, but maybe the flower sent to their home with that would be fun! I like the saying.
Oh and I have to say they have been constantly nagging my husband on when he is going to get "fixed" now...lol little do they know that it has already happened. We've been playing this one out for a long while now and have been enjoying it. "oh you know I don't think we are done yet...maybe 2 more would make us happy" , "she hasn't been feeling good lately pretty sure she doesn't have the flu but her tummy's been bugging her", "we still have room in the van for two more car seats"...lol it's been fun, cruel but fun ;)