Exotic stepdaughter makes hot offer to stepdad

Stepdaughter! Hey, didn't see you there. I was studying, sorry. What is it? What are you doing?

I was just, you know, reading my books. Reading your books? Yeah. What is this?

That's just what helps me to study. How? I could show you if you want to.

Pulsations? What is this? Show me. Oh, okay. What do you need this for?

Well, I don't know. As long as you don't tell me. Tell what? What are you doing?