Accidentally consumed alcohol by sharing food

I went to a Cafe with my friends they ate tiramesu there I didn't even touch the utensils near it as I knew there was alcohol in it and also I did not know the cafe had alcohol otherwise I wouldn't have went there so My friends ate the food and I ordered hot chocolate My friends took a sip from it and I took a sip from it but I completely forgot that they had consumed something that had alcohol in it. What is the punishment I will get for such a big mistake and how can ask for forgiveness