The scene is very ambiguous, leaving viewers to interpret his intentions. Here are some possible interpretations:
* He was simply trying to comfort her: Molly is very upset and emotional after Sherlock's "death." He might have leaned in to comfort her and show that he cared about her, but stopped because he realized he shouldn't be taking advantage of her emotional state.
* He was testing her reaction: Sherlock is known for being a master manipulator and observer. He might have leaned in to see how she would react, to gauge her feelings and see if she had any romantic interest in him.
* He was feeling something for her: The show hints at a possible romantic connection between Sherlock and Molly throughout the series. This scene could suggest that he was starting to develop feelings for her, but he stopped himself because he was unsure of his own emotions or because he felt it would be inappropriate.
Ultimately, the scene is open to interpretation. The writers have deliberately left it ambiguous, adding another layer to the complex relationship between Sherlock and Molly.