Just sit the stuff on a shelf. When/if he finds it, just tell him it's a gift for Christmas you will be making. Tell him that the pattern is "in the mail" from one of us and that it will be made shortly. Not really lying to him because it could be a gift and of course we always help out with patterns. :) :)
As for kitty, it's YOUR fault, you just didn't give her the privacy she needed while she was bathing lol