Yes, you meet her in an hotel

Two days pass, in which you constantly think about Cassies and your conversation, before she finally has news. Its thursday evening, and the two of you are already in bed.
Carries on her phone as she suddendly squeeks silently.
"Nyx replied"

She quickly scims over her message. "She says shes happy to hear from me again, and would be honored to help us out...she proposes we meet tomorrow, in a hotel not far from here. We dont have to bring anything, she´ll have us cothered for now, but she will make a couple of purchases we will have to pay for. This will gone on like that in the future, but we can opt out anytime. She expects us to be serious about this, and be on time tomorrow."

She looks at you. "And? What do you say?"
Before you can answer, her hands glide down to your boxershorts, meeting your already hard dick. "I guess we have our answer."
She moves down, and pulls down your boxer shorts. "I guess just the two of us should have fun one last time, before things change."

You barely get through the next workday, your full of exitement. Every now and again you think about this evening, and your imagination gets the better of you. Your dick presses against your pants more times that you can think, you cant believe your fantasy would come true this evening. Would it be like you hoped it would? Would you even like it? And Cassie? What did Nyx have in store for you?
Not having an answer to these questions almost killed you, but you managed to get through the day. You and Cassie met up later, she dressed in a fancy red dress, you in a suit, Nyx wanted to meet you down in the hotel restaurant first.

The two of you get a taxi, and full of exitement and aspiration, drive to the hotel.
As you step into the lobby, 10 minutes early, you look around, pretty impressed. The hotel is rather elegant, with large chandeliers and red carpets. You enter the restaurant, and get pointed to your table, where you see Nyx.

She looks completely out of place and completely like she fits in at the same time.

She wears a black dress, and sits in one of the couch-like benches cothered in red fabric, that stand at the tables.
Her make-up is black, so is her hair, up in two ponytails. She stands out in comparison to every other person in the restaurant, but at the same time, something about her apperance is elegant, royal, divine.
She looks like an evil queen in the middle of her castle. Your heart beats faster as you greet her and sit down.
Nyx smiles at both you and Cassie, something in her attitude made her seem more confident and superior than you could ever dream of being.

You try to see if she acts different around Cassie, but if she has any thoughts about seing her ex-girlfriend again, she didnt show her. Your girlfriend was a different story. You see Cassie blush a bit as Nyx looks at her, and see her quickly avert her gaze. You sit down on the other side of the table.

"I´m happy you´re here on time" Her voice is soft, but cold, and you feel like it could change in a heartbeat. "We´re gonna get some drinks, and then we´re gonna head up."

You order, and shortly after your drinks get served.

"So you need my help..."

You decide to be upfront. "Yes, we thought it would be a good move for our relationship, you know, being united in serving someone." You see her smile. "And since Cassie knew you...we thought..."

Cassies face reddens again, but Nyx nods. "I hope you understand that this is a professional agreement. I can dom you, but you need to be serious about this. I cant have you jump off after a week or two, its to much effort for me if you do that."

You feel your face get red at how openly she talks about dominating you, but you nod. "What do you propose?"

"I´ll give you a little taste of what could be tonight, and then you can tell me afterwards if you want to keep going."

The two of you agree, and shortly after finishing your drinks you follow her up to the hotel room. The room features a large window with view of the city, a queen sized bed, a chair, a small bathroom, and a Tv. It looks expensive. Nyx locks the door behind you. You see a bag standing next to the bed, she must have placed it there earlier.

"Alright." She sits down in the chair, while you and Cassie arkwardly stand in the middle of the room, "Lets begin."