He knew it was not the smartest move. He knew he should pull back. Make it stop. End the moment. Curtail the momentum before they did something really stupid.
Sharon could show up. Her dad could come out of his apartment at any moment. There were a hundred reasons why it was a bad idea. But instead of pulling the brakes, he took it a step further and used the momentum of her hands on him and his arms around her to rotate their bodies and bring her into the apartment. His hand groped blindly for the door, to shove it closed.