"Are you okay, inspector? I thought I saw you wince a bit there."
You assure her you are fine, just excited by her sensuality.
"I was hoping you were, but I can't see it! Take your pants and underwear off for me!"
You say that it would be embarrassing.
"But look, I'm used to seeing it, and it bothers me when I can't. And look, you can see me! So it's not fair!"
The pain of your erection in your underwear finally convinces you, and so you strip off your pants and underwear.