"Stop thrusting. Leave the dildo in your ass now."
She beckons you forward. "I've made you make love to that ass, now I want you to love THIS ass! No,sorry, that's not what I meant! Mouth only. You may use your hands to support yourself only. You can taste but you can't touch, haha.
Grasp your hand around your dick. Stroke hard and fast now. Leave the dildo in as it is. Give me 100 strokes, and a kiss on my butt for every five strokes."