The man in the picture is the onlooker’s son. Since he doesn’t have any brothers or sisters, the statement my father’s son can only be himself. A shortened version would be this man’s father is me, making him the father of the man in the picture.
First think of a person who lives in disguise, who deals in secrets and tells naught but lies. Next tell me what’s the last to mend, the middle of middle and the end of end. Finally give me the sound often heard during the search for a hard to find word. Now string them together and answer me this, which creature are you unwilling to kiss?
A spider. The person in disguise is a spy, the letter d is the last letter in mend, in the middle of middle and the last letter of end. When someone can’t think of a word they often say, “Err”. And lastly, I don’t know about you, but I’m not keen to kiss a spider.