what's the meaning of self-conscious in this sentence ?
A pretty waitress, self-conscious in a mobcap, arrived to top up their glasses.

Is that a waitress wearing a mabcap, and went to her guests, and poured their glasses with drink?
But what's the intention to use "self-conscious" ? Is there any possibility for her not to be self-consciious to know she should top up her guests' glasses ?

thanks

Question

what's the meaning of self-conscious in this sentence ?
A pretty waitress, self-conscious in a mobcap, arrived to top up their glasses.

Is that a waitress wearing a mabcap, and went to her guests, and poured their glasses with drink? 
But what's the intention to use "self-conscious" ? Is there any possibility for her not to be self-consciious to know she should top up her guests' glasses ?

thanks

Answer

She was embarrassed because she was wearing a funny looking hat when she went to their table to refill the drinks.

Answer

"A pretty waitress, self-conscious in a mobcap, arrived to top up their glasses."

Yes, the waitress who was wearing a mobcap went to her guests to top off or refill their drinks.

self-conscious means to be intensely aware of oneself or to be uncomfortably conscious of oneself as an object of the observation of others.  So in short shy.