Awkward soup moments

So...you are sitting down for dinner at a friend's house and they place a bowl of homemade soup in front of you. As a vegetarian, this can be an awkward moment! You know your friend is aware you are veg but did they make the soup with a vegetable stock?  Chances are, the soup base is probably made from meat. In my short time as a vegetarian this has happened to me several times.

What should you do?  Do you ask if the soup was made with a meat stock? If the answer comes back yes, then what?

I posed this question to a few people who I know are veg and got back differnet answers.  One said absolutlely no, they would not eat it. In order to avoid any awkwardness, they would politely decline without even asking if there was meat in it. The majority however, said that they would eat it, no questions asked. Most felt that you would be placing the host/hostess in an awkward position if you ask and it turns out that there is meat stock in it.

What would you do?