After a few minutes of servicing, Matt felt the boner in his mouth stiffen to its maximum extent. He teased the large balls with his fingertips, as his tongue made its way around the large cockhead, but nothing came out. Mr. Martin was obviously holding back, and Matt felt the thick erection expand a little bit further as Matt's own size was reduced.
That was the push that the large man needed. The head mushroomed in Matt's mouth as it dished out its hot load. Matt's small hands worked the expanding shaft while Mr. Martin was rewarded with a few more inches. Matt took the big load eagerly, feeling light-headed from all the sucking and shrinking.
Finally, Mr. Martin began to soften and Matt relented. Matt gazed up at his large man, now more than twice his own small size. Big balls still in his hand, Matt asked, "How are we doing?"
Mr. Martin looked around. "We've still got a long way to grow... I'm probably not a bit over 4 1/2 feet, but I don't know what else we can do," Mr. Martin said, extending a large hand to help Matt climb out from under the steering wheel. "I could try to go get help," he suggested, looking out the window.
"You could do me," Matt suggested. "I got you off, and that gave back half of what you lost. Maybe if you get me off, that will restore the rest." Matt could feel his body start to shrink again before he even finished his suggestion.
"Matt, I..." Mr. Martin began his reply. Matt watched as the hair on the big chest before him seemed to get just a little deeper. The differences in their sizes became more and more pronounced as Matt dwindled. Mr. Martin's body seemed to be both moving away, and simultaneously getting broader, thicker, and more detailed.
"Just try it," Matt said, getting concerned that his dick would soon be too small for the larger man to enjoy. Matt sat in Mr. Martin's lap, his back against the big steering wheel, his small boner waving in the air, facing Mr. Martin's bare bear flesh.
Slowly, the fingers of a large hand found their way to Matt's anxious erection. Gingerly, the brushed it with their own thick, cylindrical mass. Mr. Martin jumped as he felt a few inches suddenly added to his frame. The car jumped slighly too, suddenly taking up more space in the alley. "Wow," was all he said as Matt settled in to be stroked by this ever-larger man. There was obviously some remaining conflict in the giant, as Matt felt himself occasionally shrink a little more -- a feeling quite distinct from watching Mr. Martin regaining his size.
After a few minutes when no more size was being added to Mr. Martin, Matt felt himself begin to steadily shrink again. Each inch he lost was more pronounced, so it was clear something big was about to happen. Finally Mr. Martin took his hand off Matt's tiny prick. "It's stopped working," the manly mountainside rumbled. "And I'm still missing almost a foot."
"Then you are going to have to suck me," Matt said. Immediately he felt a wave of contraction rush through his body, the steering wheel slipping against his back, and Mr. Martin's big nipples widening before him. "You'd better hurry, because I'm almost down to my last 12 inches," Matt added, feeling the quickened pace of his dimunition taking its toll.
Mr. Martin hestitated, so Matt leaned forward, feeling his small wrists sink into the warm, furry flesh of Mr. Martin's abdomen. With some effort, he was able to crawl over the belly -- which would have been small to any normal person, but was quite pronounced to Matt's sensitive touch. But Mr. Martin's chest was too steep to climb, so Matt reached as far up the furry front of Mr. Martin as he could, feeling his little body sink down into the hairs on all sides. Matt waited, knowing Mr. Martin couldn't last forever.
After another few inches were lost, two giant fingers lifted Matt under his arms. He was conveyed through the air by this very special crane, and he dangled his remaining inches in front of Mr. Martin's billboard-sized face. Feeling himself completely at the whim of this giant was a thrill greater than any carnival ride. From the cool air that curled beneath his feet, Matt knew he was shrinking through some of his last inches.
Tentatively, a huge pink roll emerged from between Mr. Martin's thick lips. The tongue, as big as the pillow on Matt's bed, gently probed what was left of Matt's tiny dick. Mr. Martin was rewarded by another jolt of size. "Take it," Matt said, looking into the big black disk that was Mr. Martin's left eye. Matt felt what was left of his body shrink again as Mr. Martin's last resistance was beaten down.
In a moment he had Matt's tiny form pressed against his face, the insignificant cock sandwiched between the firm but soft cushons of his lips. Matt was startled by the force with which Mr. Martin sucked him. For some reason, both effects seemed to be happening at once -- Mr. Martin was growing back the last of his inches, but Matt kept right on shrinking. Mr. Martin adjusted Matt's tiny form in his fingers one time, and it seemed that in no time Matt's dick was bucking.
The reduction of Matt's body squeezed the cum out of him with great force and Mr. Martin just closed his eyes. The rough edge of a giant tongue rolled across the very tip of Matt's shooting rod. As half of Matt's remaining inches were lost, and all of Mr. Martin's missing ones were restored, he felt himself falling away from the soft lips and strong fingers, crashing into the hairy revine between muscular pecs with a bounce.
Righting himself, Matt stuck his head above the hair line... now half his height. Above him, Mr. Martin's eyes and mouth were closed. Turning, Matt saw that far below a huge rod jutting out from Mr. Martin's crotch. Mr. Martin grabbed his dick with one hand and started jacking off furiously.