A Woman of Intelligence by Karin Tanabe

In 1954, Katharina Edgeworth lives on the Upper East Side of Manhattan with her husband, Tom (a surgeon), and her two young sons. Before marrying, college-educated Katharina worked at the United Nations as a translator and enjoyed being single amid the rousing nightlife of New York City. When FBI agent Lee Goldwell approaches her and asks her to feed them information about her old college boyfriend, Jacob Gornev, whom they believe is part of the KGB, she readily agrees, because she is looking for any escape from her home life. However, she has to hide what she is doing from Tom, who believes she should be spending all of her time with the children. This puts a strain on their marriage and causes Katharina to think again about what kind of life she wants for herself. A Woman of Intelligence is a great read-alike for those who've enjoyed the books of Beatriz Williams.