Aki loves to flirt with and tease people, especially Toshi. The way he gets so nervous is just too cute to her. And whenever she sees someone staring at her, she figures it'll be fine to mess with them. In this case, blowing a kiss and some sweet words should do the trick.
Aki: "Like what you see, huh? Sorry sugar, but I have a strict 'look but don't touch' policy."