Husband hasn't discovered the birthday surprise!

As you know, (but my husband doesn't), our eldest daughter flies in tomorrow morning to be here for her father's 70th bday. He'll probably say, "What are you doing here!" And then on Friday afternoon and evening, the entire family (except for our daughter's boyfriend) gather to celebrate a birthday dinner and show. And my husband has not figured it out! Thankfully, the inn does not charge us til we arrive. And no one has let it slip. My husband has been questioning my father and our son, but their lips are sealed. Now my husband is highly intuitive in matters regarding himself, figured out that we were getting him a bowling ball for Dad's day and when I asked him "Guess what I found today," he honed right in that I had found his folding knife. But this time, at least until we take off down the expressway, he does not KNOW. How sweet it is!