About this scene
Short setup clip from earlier in the same encounter. She's not on her knees yet. She's on her feet, leaning against the open passenger door with one elbow on the frame, talking to him at normal volume. The conversation is small talk on the surface and not small talk underneath. She drops her shopping bag on the floorboard at one point and doesn't pick it up. That's when you know she's already decided where this is going. The clip ends thirty seconds before the next one starts.
What to watch for
Watch the bag. She's holding it through the whole conversation, switching it from hand to hand, until the moment she puts it down on the passenger floor. After that, both of her hands are free, and her body language opens up by about ten degrees. That's the decision moment. Everything after is just timing. The clip cuts off right before she leans further in, and the next video in the series picks up from there.