Refusing alcohol before people know you're pregnant.

Hubby and I don't want anyone knowing we're expecting just yet, and with the holiday weekend coming up and my family being French rooted, wine and other alcoholic beverages are bound to be given to me. I can't think of any excuses to use to decline the alcohol besides "I'm taking a meditation." Have you ladies used any responses that worked and didn't question those that knew you best? ie. "I'm watching my calorie intake." When they clearly know I don't work out or have ever cared about counting calories.