You just had a great dinner and now you need something sweet. Go for it and be mindful! Satisfy your craving with a smaller piece.
If you really want to have a bigger portion then try to burn some calories off before or afterwards. Moving around, dancing, playing with the kids. All great ways to burn some calories and make room for that piece of cake.
Or you can bring your own dessert! Something you know won’t make you feel guilty!
And remember do not be so harsh on yourself! The holidays are about enjoying food and spending time with our loved ones. The best advice is to be mindful! Do not stress too much.