You head out to the car before Vivian comes out to turn on the lights, in hopes that it’ll make for a good show.  She finally comes out, tries to start the car and as usual, it doesn’t start up right away.  She notices the battery is going weak and it eventually dies, just clicking.  She’s putting 2+2 together and figures out that you’re behind this, or at least she thinks you are…uh-oh!