The rest of the evening...

You watch in a mixture of anguish and Dave is fucking the tied and bound Xiang until he finally cums, gargling and screaming, his hard cock buried deep inside of her. Then he unties Xiang's ropes and vanishes in the shower, not even sparing you another glance. The Asian woman walks over to you, graciously and smiling. You struggle in your restraints.

"Shhh, Mistress", Xiang says, in a calm, soothing voice. "You need relax. Feel bonds. Embrace helplessness."

You look at her, confused. Xiang reaches out and starts to carress your left nipple. It sends shivers through your spine.

"You must understand, Mistress. You are woman who enjoy be tied and helpless. You need enjoy and embrace. If you resist, you not find the real, full pleasure waiting for you. I can help. I can train you. I know how you feel."

Her fingers sensually pinch your nipple and you moan and gasp. She giggles softly.

"We will train your senses. Make you full aware of deep pleasure to be a ****", she says. "If you truly submit, Dave will lust for you again. That what you want, right?"

You nod, your mouth suddenly feeling dry. Xiang smiles. "Good", she says, and squats down right in front of you. You suddenly find yourself staring right at your crotch, and you discover a partly dried trail of cum, which has run down the inner thigh. Dave has not even used protection, you realize! Again, you should be shocked, but you aren't. Just... a bit humiliated, and somehow, that humiliation feels... warm inside you. Xiang takes your head gently but firm into her hands and looks at you.

"Now. Lick me!", she says, her voice suddenly crisper and harder than before. "You lick me clean."

She pulls your head closer to her pussy. Tied as you are, there is not much you can offer for resistance. Of course, you could turn your head and refuse.