"Yeah? Well, how about I tease your dick with my mouth while you try to tell me all the things you unprudishly like. If you manage it, maybe I'll give you a reward." Not that sex itself wasn't a just fine reward, but hey. They were playing here. And keeping him on his toes and making him have to think while she flicked her tongue over the head of his cock as a test was just fun.

And a little evil.