They both beg for Mark's cock

At this the two of them drop to their knees and put on a show.

"Please, Mark, please give me your huge cock. I'll do whatever you want, just fuck me with that monster," cries out Melanie grabbing onto his leg and resting her head on his enormous package.

"Yeah, I want so bad for her to have it, I'm ****, I'm begging," says Josh, trying to give his best performance.

"Ehh, you have to do better than that" says Mark, looking down at Josh. "You don't seem that excited about this, I feel like you're just saying it because it's what she's into it. Why should I believe that you really both want me here?"

Josh is torn as to what to say. He doesn't want this to get any gayer than necessary, but at the same time he needs Mark if he's going to compete his plan, and has to give in and say the magic words.

"We're both here in matching pink thongs on our knees, begging for your cock," he says, in what is not entirely mock desperation, "we want it, we need it, please fuck her with that huge, beautiful, mushroom-headed cock, I'll do whatever you want, just let us have your cock!"

Melanie puts a hand on Josh's back in acknowledgement.

"Well, since you want it so much, then okay, I can give you two a try," Mark says with feigned doubt. "You can start by undressing me."

Melanie and Josh each untie a shoe, and Mark lifts his feet one at a time to allow them to remove the shoe and sock. Then, Josh unbuckles Mark's belt as Melanie pulls down his fly, and they open and pull down his pants, leaving only the thin stretched fabric of his tight boxers to separate the huge outline of his not-yet-hard cock and surprisingly large balls from the faces of Melanie and Josh. They stare at it in amazement and resignation respectively as Mark steps out of his pants.

"Excited for the big moment?" Mark taunts.

Melanie then wraps her fingertips around the elastic of his boxers and smiles at Josh, who does the same on his side.

Together they pull down down the boxers, and Melanie gasps. The cock is longer and thicker than Josh's, even when soft, and hangs in front of their faces.

They stare at it for a moment as Mark pulls off his t-shirt and throws it to the ground behind him. Melanie can barely believe the size of the cock that will soon be inside her, and Josh can barely believe that he is on his knees, submitting to this huge naked man.

"The trouble," Mark says dispassionately, "is that a big cock needs a lot of blood, so it takes a bit more effort to get it ready."

He then looks at Josh, who gulps with the dread of what he thinks may be about to come.

"You said you'd do anything to get me to give my cock to your friend here," he says. "Well, now's your chance. Get me hard. You can start by sucking my balls, straight boy."

Josh sighs, but tries to put on a brave face so as not to ruin it for Melanie, and bends down to start sucking on Mark's ballsack. After a moment of moving left and right, trying to get into position, he soon realizes that he has to move the cock out of the way. He gingerly reaches to lift it up with his fingertips, pressing it against Mark's stomach, and drops himself yet further to reach Mark's now-exposed balls, which he sucks into his mouth, guided by his other hand.

His balls are gigantic, and barely fit into Josh's mouth. He gently sucks them, slowly leaning back and forward as he does so to gently pull them close to and away from Mark's body. After some time Josh's arm behind to tire, and he can no longer hold the cock in place, forcing him to let it drop on his face.

In the corner of his eyes he sees Melanie angling to get the view that she always wanted: one man sucking another's balls, a cock flopped across his face. He can't see Melanie beginning to discreetly masturbate to the picture that she has so often searched out online, and never expected to see for real.

As Josh continues, Mark's cock gets harder, longer, and thicker, until eventually it is completely hard, which he tests by grasping it in his hand and squeezing it to see if it has any give. It does not, and Josh, now deflated by shame, releases Mark's cock and balls, waiting to see what he plans to do with his now-erect member.