Sherlock's gasp confirms a hypothesis that she made earlier when she kissed his neck: Sherlock's neck is an intense erogenous zone. She files this information away and it reminds her how exciting the "getting to know you" phase of a sexual relationship can be. Terrifying to a certain degree but also exciting.
"You can take it off," she says of her camisole, barely breaking their kiss to get the words out.
no subject
"You can take it off," she says of her camisole, barely breaking their kiss to get the words out.