She wants both of you in chastity

"Get up."
You dont even think about it, you just obey. Something about Nyx´s aura makes it very easy for you to follow her instructions. Cassie seems to struggle a bit more getting up, her legs are still shaking a bit, and the handcuffs dont make it any easier, but eventually she manages to. The two of you stand next to each over, as Nyx, again, reaches for something in her bag.
Your heart stops for a second as you see whats in her hands.
A silver female chastity cage rests in her hand. It looks heavy, and cold. You look at your girlfriend, you think to see some fear in her eyes, which are locked to the device in your misstresses´ hands. But once again, you feel that shes torn, that she doesnt only fear the chastity belt, but also...desires it...feels herself drawn to it.
Before you know it, Nyx steps behind you and uncuffs you.

"You´re going to put it on her."

You rub your hurting wrists for a second, then you take the chastity belt out of Nyx´s hands.

You kneel down in front of Cassie, on the hotel floor, and help her step into the belt. Her pussy still looks wet, and for a moment you´re tempted to lick off some of the juices, but you decide its best not to.
Still kneeling, you fasten the belt around her waist, and watch as her pussy dissaears behind the silver. You see your own reflection slightly distorted in the medal. Then you grab the padlock, you dont see a key anywhere nearby. You look up at your girlfriend, you already feel your dick getting hard again.
Cassie bites her lip, and nods.

With a silent click, the padlock closes, sealing away your girlfriends pussy.

"Good. Get back up."

You follow Nyx´s command, as you get back up, you´re fully hard argain. You think about grabbing your dick, jerking off, doing anything to get some of the satisfaction you were denied, but you decide not to. Instead, you let Nyx cuff your hands behind your back again.

"I think you know whats coming next."

She goes to her back, and returns with a small, silver chastity cage.