The two boys were walking from a restaurant in downtown San Anselmo to their house on Greenfield Avenue at around 6:40 p.m. when the woman pulled up alongside them and told them to get in the car.
They did not know the woman, and cut through a parking lot to get away from her, police said.
She stopped again on Greenfield Avenue and told them, "You're guilty. You're delusional. Get in the car," according to police.
The two boys told the woman, "No," and she drove east on Greenfield Avenue to Redhill Avenue toward San Rafael.
The boys told their parents what happened, who called police.
The woman was described as a white woman in her 70s with gray hair and glasses, driving a dark blue sedan with a large plant in the back seat.
Anyone with information about this incident has been asked to call San Anselmo police at (415) 258-4610.