She continues to push the dildo deeper in her pussy and lightly rub her clit while moaning. She is clearly living out some fantasy that has eluded you and her body is responding.
Her eyes are still closed and she says, for your benefit, "Oh... I've nearly forgotten what it feels like to be fucked by a reeealll man."
Her pace quickens slightly, and she spreads her legs wider as if to demand the dildo be pushed deeper. You can tell by the sound of the thrusting dildo that her pussy is getting even wetter than it was before. Her desire for the dildo is second only to your desire to watch her cum on that dildo.
Her wet noises will mask your own wet stroking sounds, so you decide to pick up your pace. Stroke for another 60 seconds, a little faster than before, and then...