She was unsure of what to expect when she arrived to give him a handjob, and she likely would not have come if she had known the size of his cock beforehand. When she first saw his dick, she thought this was a prank, as it's the smallest dick she had ever played with, and trying to give him a handjob with her entire hand was impossible; using 2 fingers was the only option she had, which made her tired and angry at this whole situation.