It seems our sons share their father 's and my sarcastic sense of humour . Perhaps it is a survival skill , but it is a skill they have mastered nonetheless .

* Her son is a joker .
* Her son is a liar .
* None of the above choices .
* Her son is a con artist .
Answer the following question: Why would the mother be unsure whether to believe her son ?
Her son is a joker .