It's a testament to her hunger that she doesn't notice Sherlock watching her. Or maybe it's just that he's always watching and noticing things so much that she's gotten used to being passively observed when in his presence. While it used to make her nervous, now it just...exists. She's always been hyper aware of him whenever he's around anyway. She's just used to it at this point.

His shoulder pressing into hers, though, is new.

She looks up from her food and toward him, her eyebrows raise in question, a small smile on her lips. She expects that maybe she's been shoveling her food in and he's going to make some teasing remark about it.