Nothing

Kiki doesn't say anything, instead she just leans over the aisle and starts sucking your cock. Her tongue teases the bottom of your shaft as her head bobs up and down in your lap. You really hope no one notices.

Kiki wraps one hand around your balls, fondling them softly, and the other around her cock... already hard again from the excitement! The lesson keeps going and no one seems to notice... except for Kiki's friend sitting next to her, who starts rubbing her panties while looking at you two. You give her a wink, then focus on Kiki.

A sudden warmth floods into your body from your cock as your cum sprays down Kiki's throat. She sits up, some of your cum leaking from her mouth and leans over to kiss you.