The trio plays a fun game with Jack.

Jack goes to the door.
He knocks.

"Come in," Melissa says.
She is posing with her back to the door and looking at him.

"Looking nice," he says.
"Thanks. I like to show off my best side."
"I won't argue with that. I'd just say that you don't have a bad side."
"Aw, how sweet," a voice calls out.

Jack looks over in the direction of the voice and sees another lovely sight...

"Always spoiling the surprises," Jenna says.
"Sorry. I don't think he minds though," Emma says.
Jack smiles and nods.

"Anyways," Melissa says, "We decided to play a little game together.
You need to put *this* on first."

She pulls out a blindfold that she was hiding.

Jack takes it and puts it on without question.

"The game is simple," Melissa continues, "I'm going to lead you over to the bed.
We're going to have our way with you.
When you cum, you have to guess which one of us you finished on or in.
If you get it right, you win a prize."
"What's the prize?"
"No sense in telling you what you may not win," Jenna says.
"But it's a good one," Emma says.

Melissa takes Jack's hand and leads him around the corner and to a bed.
Someone strips his shorts off and strokes his cock.

In fact, at least two different hands do the latter.

A (presumably different) pair of hands pushes him down onto the mattress.

He's held down as he feels a body climb on top of him and put his cock in their pussy.

As they start to ride him, he goes to move his hands towards their tits (or where he thinks they are), but they are grabbed and **** back down.
He's not fighting it, so it doesn't necessarily have to be Melissa.

He hears what it is nearly a moan before it is smothered.
One of the others is kissing the girl to keep him from getting a hint.

The game is afoot.