He stays, under a condition

"I think i´ll stay" Khalid says, clearing his throat. You look at him more closely. Hes definitely older than his girlfriend, but not by a lot. Hes not ugly, but also doesn't look stunning, the kind of person you wouldn't look at twice.
"I have an idea." Aisha grabs Khalids hand across the table. "Can I tie you up? Please?"
Khalid looks taken aback. "I dont..know.."
"Come..Please..You always told me you thought the idea hot of being tied up."
Khalid looks at you, he seems to blush a little because you hear his girlfriend expose him like that, which you think is funny. After all, hearing about this wasnt comparable to what you were about to do with his girlfriend.
Aisha continues to work him. "Please...Besides, think about it. What if you cant hold back? what if the sight we are about to give you is too hot, and you cant help but touch yourself?" She speaks kind of patronizing with him. but he seems to think about what she says. "That would be a shame, wouldnt it?"
He nods, slowly. "Alright, yeah..."
Aisha claps her hands excited. "Great! then les get started."
Now he seems taken aback again. "What, like, right now?"
"Of course darling. The others could arrive any minute. Ethan, can you help me secure him?"
You agree, and follow the couple into the bedroom.

Its a nice place, with dark curtains and a large bed draped with pillows and duvets. Aisha makes Khalid get a chair from the kitchen, and places it in a corner. "Now undress darling." She smiles.
Again, Khalid hesitates, his eyes darting to you. "Really? Why?"
"Weeeell" Aisha says, tipping his chest, "Because I can imagine that you are going to get pretty excited seeing me and all those big, strong men in a couple of minutes. And I imagine that would be pretty uncumfortable with all these clothes on."

Khalid nods, once again being convinced by his girlfriend who, how you discover more and more, seems to have a pretty specific idea on how things are supposed to go.
Khalid finishes undressing, you pay him no big attention, his body and dick, like everything about him, are average.

He sits down on the chair, and Aisha gets some ropes, with which the two of you tie his arms, legs and torso, so that he can barely move. Then, Aisha looks at you and winks. "Should we greet the others in the kitchen?"
You agree, and the two of you leave the tied up Khalid in the bedroom.