Let her go with it.

Hmm...well, she's a closet pervert. Why should I interfer with her creative flow...if said flow will get me laid. Naoto grinned, looking quite like the canary that ate the cat. "I take it that you like what you see, hmm?" she purred, cupping her breasts. I could only nod, mutely.

She kissed me again before moving her lips near my ear. "There's something I want to try...if you're interested," she whispered, nipping my earlobe. Smiling, I gave her ass a squeeze. This made her jump a bit, much to my amusement. "What did you have in mind?" I was curious. What would a detective do for fun during sex?

I could see roleplaying as with a bit of good cop/naughty cop. Perhaps she'd like to use some handcuffs in a playful manner? A spanking for all these naughty thoughts she seems to have? Ah, the possiblities...