What does Judges 4:17 mean?

But Sisera ran to the tent of Jael, the wife of Heber the Kenite, because there was peace between Jabin, king of Hazor, and Heber's family. Judges 4:17 - Modern Text Bible

(Sisera seeks safety with Jael, thinking her family is neutral or friendly. He doesn't realize he's running into danger.)