In the movie "Miss Peregrine's Home for Peculiar Children" Jake was saved by the peculiar children while he was into a pub. An invisible child made pots and glasses fly all around and another start a fire on the pub's door.

At about 36 minutes of the movie there's a dialogue:

a child:

Miss Peregrine, there's a policeman at the door. He says it's about the pub!

Miss Peregrine turns a blind look to Emma (hope my English is correct here) and says:

We'll discuss this later, Emma.

then goes into the house.

Jack says:

It wasn't their fault. Honestly, they were just trying to help.

Emma smiles. Miss Peregrine smiles too, then go away.

After Miss Peregrine has left, Emma says:

Thanks. You're not as wet as I thought.

What does it mean "wet" in this context?