Usually Eunice and he were merely neighborhood chums, and quarreled with a wholesome and violent lack of delicacy; but now and then, after the color and scent of a dance, they were silent together and a little furtive, and Babbitt was worried.
There are no more uses of "furtive" in the book.
Show samples from other sources
She watched me in a furtive manner—trying to hide her interest.
Later she said she was just trying to figure out whose phone it was, but she looked around furtively before she began reading my text messages.