It’s different outside of the shop. It’s different when she can lean over and kiss the bookkeeper as she’s desired to do for months. It’s different when Hermione sees her book on the bedside table and knows it really is a passion and not just a job for the bookkeeper. Their entire relationship is different when she can call the bookkeeper hers and finally feel at peace. She’s the most safe, the most comfortable when she’s with the bookkeeper.