Why does former FBI agent, Marie Mitchell, flee her home in Connecticut with her children?

In 1992, Marie Mitchell, a former FBI agent, is living in Connecticut with her twin four-year-old sons. She hears a quiet intruder in the house, and uses her skills to apprehend and kill the mysterious man. Terrified that her former enemies in intelligence have identified her location, she takes her sons and flees to the tropical country of Martinique, to stay with her mother, Agathe.