Sentence:  Nearly all great criminals lead <WSD>double lives</WSD>. Strange as it may appear, it is a fact that some of the most unscrupulous rascals who ever cracked a safe or turned out a counterfeit were at home model husbands and fathers. [...] I recall one desperate fellow who paid for his two little daughters' education at a convent in Canada, from which they were graduated well-bred and bright young ladies, without ever a suspicion of their father's business reaching them. 
Meaning of the word marked with <WSD> tags:  An existence or life that has two aspects, particularly when one of them is regarded as embarrassing, immoral, or unlawful and thus kept hidden from a person's family, friends, and work colleagues.