It's quite possible that you'll all find out about this in just a couple of days. :)
September 12 really is just too far away. When Sara got home from work the other night, she commented that it's been getting harder and harder to "suck it in" so the folks she works with don't notice that she's starting to show (not a whole lot mind you, but just enough that it's unrealistic to think we'll make it another 4 weeks without having to come clean.)
With that in mind, this may just be the weekend. I talked to her today and I think she's in agreement that now that we're more than 13 weeks in, we might as well just get this one little detail out of the way. And it will actually be a relief. I've never been great at keeping secrets, especially good ones. I'm lucky that we typically don't buy each other extravagant Christmas and birthday gifts (if we buy any at all.) If I buy a gift for her more than a few days in advance, I have a horrible time not just giving it too her. The fact that I've made it to mid-August is actually quite a feat.
Waiting until September 12th and announcing it to our parents on Grandparent's day would have been neat, but it also would have been almost half way through the pregnancy. I think any of you who have had a baby can probably attest to the fact that hiding something like this at 17 weeks would be more than just a little difficult.
Maybe she'll talk me out of it, maybe not. If she doesn't you'll all have the scoop by Monday morning!