Tonks saw his smile falter, it was comforting to know that he felt the same way about going home. "Did you have a good time tonight?" she asked him once they were outside the theater and on their way home.
She didn't think that him being closer to her was for her protection, but thought it was because he wanted to be closer to her like she wanted to be too. Of course Moody had taught her his famous constant vigilance theories, they were ingrained in her so even when she wasn't on duty she was vigilant and always aware of her surroundings. She wasn't at all worried.