Tips to hide being pregnant?

Becky • Baby #1 due in feb!
My husband and I are thrilled we are having a baby, but it's too soon to let our family know. We are going to a huge family wedding, there will be a toast and wine on every table. My family knows I enjoy wine. They will notice when I don't have any. My dress is very fitting. I will be 11 weeks, any tips? I really don't want people guessing while we are there to celebrate my cousins wedding.