The first time it had happened was just a few months after Wilson's death.

Cuddy wanted to put some flowers onto his grave because it was his birthday. When she walked into the direction of his tombstone she was sure that she was seeing things. It couldn't be. HE was standing in front of his best friend's resting place. House. When she moved closer he seemed to recognize her steps and turned to face her. She was shocked that she wasn't that surprised after all. He simply nodded at her and waited for her to place the flowers on the ground. A few minutes later, when she walked back to her car without having said a word to him, he followed her to the hotel where she was staying. He followed her into the elevator that brought them to the floor of her room. He followed her into her room …

Afterwards, she looked at him … "So you're back." And it wasn't a question.