A rematch!

“I want a rematch.” All three looked at him incredulously.

“A rematch?” Ray asked.

“This wasn’t a fair experiment. For all we know Freddie just comes faster than Liz.” Liz mouthed the words “what are you doing?” to him, but he pressed on. “I want a rematch, with swapped partners.”

Ray didn’t need any convincing at all. Fucking a guy’s own girlfriend in front of him would be even more humiliating, and on top of that Liz was pretty hot.

Freddie just shrugged. “Knock yourself out.”

Liz accepted almost angrily. She was clearly confused at what Paul was up to and upset at him for acting so weird, and perfectly willing to have a better fuck. Paul whispered to her “show him a good time, okay?” She gave him another confused look, then snorted acquiescently.

The girls stayed put, the guys traded places. The new couples shook hands, since they didn’t quite know what else to do. “Okay, take your positions,” said Paul.

Liz stayed on her back. Freddie rolled onto her back (getting Ray’s come on the blankets), ass still on the edge of the bed, her legs on Paul’s shoulders. “At least I’ll get a good stretch,” she explained.

Paul counted them in again, and they got started. Paul had hoped his dick would already be larger; it wasn't, but he had a plan. Paul stuck his cock into Freddie and kept it there out of sight, trying not to put on a good show for Ray. He looked over to Liz, who met his gaze. He gave her a look that tried to say “go on, enjoy yourself.” Maybe she got the hint, maybe she didn’t, but either way she pulled Ray’s head down to suckle on her tit. It was cheating, but Paul wasn’t going to call him on it.

While Ray was distracted, Paul made his move. Into Freddie’s G-spot. He rammed it as hard as his little dick could, and prayed.

It worked. He felt his cock begin swiftly swelling in length and girth. “Oh, yes!” he bellowed as it reached an average size. But it didn’t stop there. He knew it wouldn’t. It kept swelling... six inches... seven... larger than Ray’s... eight... He thought it might stop there, at the size he fucked Liz with, but he still hadn’t bottomed out and it kept growing. Freddie must’ve had her share of big cocks before.

His balls were growing too, from marbles to robins’ eggs, to walnuts, to ping pong balls, to chicken eggs. They were beginning to slap against Freddie’s ass nicely. She was moaning now. Paul spared a glance for Ray, and saw that he was looking a bit worried.

Finally Paul felt himself bottom out in Freddie, somewhere just north of nine inches long and about seven around. Now the growth would stop, and he could just focus on fucking her brains out.

But it didn’t stop. “Oh! Yeah! Fuck me! With your! Monster! Cock you! Stud!” Freddie cried out between thrusts. He was slamming into her back wall on each thrust now, and he had to imagine it hurt. His girth was also expanding, stretching Freddie’s pussy farther than he thought it would go. He had to be more than ten inches now... eleven...

“Oh! Yeah! This is What it’s Like to Get FUCKED By a REAL MAN!” Freddie screamed. And then Paul noticed that she wasn’t looking at him... she was looking at Ray. It clicked. His huge and still-swelling cock was hurting her, but it was worth it to her to humiliate Ray. Paul was taking a liking to Freddie.

Paul’s cock finally stopped at about a foot long by eight inches around. Multiple inches were left in the air at every thrust. Between that awesome tool and the self-doubt that Ray was now facing, there was no question who would win this round. Sure enough, Freddie let out another scream that must have been audible through the whole motel, and Paul felt her already vise-like pussy clamp down on him even harder.

Paul kept thrusting in time with her slowing contractions, then slowly began the long process of pulling out. Freddie reached a hand down and grabbed his cock, stopping him with several inches still inside her. “No, please, keep fucking me.”

Paul looked down at Freddie’s imploring eyes, then over at Liz and Ray to see what they thought. He noticed that Ray had lost his erection. “Maybe I’ll just,” Ray mumbled, “see myself out.” He hastily pulled his underwear and pants on, pulled out his wallet and put a pile of bills on the table without counting them, and slipped out of the room clutching his shirt and shoes.

Liz purred, “I’m staying right here,” and walked over to Paul and Freddie’s bed, where she sat on Freddie’s face and kissed Paul as he began slowly rocking his too-large cock in and out of Freddie’s straining cunt.