Why do you need to fib at all? Just don't mention it. If anyone asks, just say baby will be here when it's ready. When you go into labour, turn your phone & computer OFF. Both of you!

The only people we told were my parents & DH's parents, both times. DH's dad is his boss so we had to tell them as he needed the day off work. My parent's were looking after DS for DD's birth. They both came earlier on their own anyway.
I've already mentioned that thursday i book my induction not really thinking i didn't want to be recieving calls/texts. So if we say that they couldnt give us a definite date and then have it a surprise it should keep everyone happy. But i do like the turning our phones off thing! Though knowing some of them they may call the hospital if we are unreachable...