*By being a comely American spy girl who has a ton of sex to get them.
http://www.atlasobscura.com/articles/the-brilliant-m16-spy-who-perfected-the-art-of-the-honey-trap
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She was soon given a big assignment— to discover the Italian naval codes.
Betty’s family connections and blue-blooded background were instantly useful. The man the BSC wanted her to trap was none other than Alberto Lais, now Italy’s Naval Intelligence agent, and the man running Mussolini’s secret spy network in the U.S. Soon, Lais was telling his “golden girl” secrets as he stroked and petted her, but never consummated the relationship. Betty, with her expert communication skills, was able to lead their conversations into areas the British were interested in. Eventually, she was able to bribe a clerk for the books containing the Italian naval codes, virtually neutralizing the Italian Navy for the duration of the war.
Her next assignment would be her greatest triumph. Having had so much success with the Italians, Betty was instructed to infiltrate the Vichy French Embassy. Betty’s mark, press attaché Charles Brousse, a married, charming man with serious concerns about the Nazis, immediately became Betty’s one “complete love.” Still, she made her boundaries regarding fidelity clear: “I do not belong to you or anyone else, not even to myself. I belong only to the Service,” she told him.
Soon, Betty had recruited Brousse to the Allied cause. But he balked at one assignment— to steal the French naval codes. “There’s a war going on, and if you, who swear you love me, will not help me, then I will either work alone or with someone else who will help me,” she threatened. He soon acquiesced.
To get the codes, Betty orchestrated a brazen plan....
