Tease her body.

With a devious smile you begin to rub her breasts, squeezing them in your firm grip. You know for a fact that despite her being unable to move, she can talk, and she can feel additional pleasure.

Barely you can hear, "O-Oh... Oh god..." as you rub them. She's still having an orgasm, unable to stop, and now you're teasing her body even more. You're certain she's never felt this level of pleasure before.

You pinch the tips of them and twist tenderly. Her eyes are as wide as they possibly can be, and it's difficult to tell, but you're almost sure her entire body is shaking.

"Have you ever had an orgasm last this long?" you ask.

"N-No..." she mumbles.

"Sorry. I didn't hear that." You squeeze her nipples harder and you hear a quiet moan.

"Ooh... N-No... Oh god."