Lol I would have her squat ride on his cock while she faces the camera, sitting straight up or leaning a bit forward towards the camera me making sure she appears on the screen with her excited face near the top, and her pussy milking her lover's cock near the bottom of the screen, so the whole front of her body including her face is visible at the same time.
She was a real whore.
Just as finding your soulmate increases your libido, so too does it activate the reward center in your brain, according to psychologist.
Understand that your girlfriend will be on the defensive, and therefore will likely try to upset you.