"Oh," she says like a revelation. This is just for her, for them. She's the only one he wants to share this with. (Mycroft probably knows too because he knows everything, but he doesn't count.) It's better than any actual gift. He's trusting her with this information, that she won't run off and tell or make fun of him for it. It makes her feel special.

A shiver runs through her body at the feel of his lips and him breathing her in. It makes her feel desired.