[Her gaze flicks up to his face for a moment before back to what she's doing.]

Ah... You look... so good.

[Her voice is rougher now, and she shifts slightly, partially to press her thighs together to try to address some of her own arousal, which doesn't really help, and partially to get a better angle for her arm to move, which does, and she picks up the pace with firm, steady strokes.]

I want to see you get off in my panties.

[She had some other ideas here, but in fact she's very bad at avoiding getting distracted.]