Three Months Later...

Are we really doing this?"

Doug laughed to himself, happy with the job he had done. Fiona looked down at him with an arch in her eyebrow and a smirk on her face. She was skeptical, but she also knew that he liked her because she was so much taller than him and this helped show just how much bigger she was.

"Yeah, we're doing this," Doug beamed up at her with shining eyes, "I worked all morning, you know you're curious."

"Well," Fiona looked at the wall where her boyfriend of three months now had marked a few spots up the length of it, "I guess I can do this."

She slid her large feet out of her sandals. They were a new pair, ones she had gotten for her birthday a few months before, but they had already started feeling tight this last week. It felt good to be free of them, the cold of the floor beneath her pink soles, and the red where the straps had bitten into her soft skin had already started to ease. Doug could feel the thud of her weight through the ground, feel the short length of his penis start to throb in his shorts, as she stepped by him, towering over his smaller stature.

"I can't believe you went through all this trouble."

There was a smile on Fiona's face, belying her amusement. Truth be told, she did enjoy being tall. There were girls at school even taller than she, but if her family history was anything to go by, she'd leave them all behind. The thought of that made the nipples capping her breasts stiffen into rock hardness that poked at Doug through the thin material of her shirt at his eye level. She paused a moment, turning to face him, and brushing not only the hard tips against his forehead, but also the bulge sheathed in pink shorts over her crotch across his stomach.

Doug's eyes went wide as he looked at it with a deep swallow. Since they had started dating, she had come a bit more out of her shell, ditching flowing dresses and bulky sweatshirts in favor of tighter clothing that hugged her slender body and large, swaying cock. Right now, it was wrapped in lycra spandex, the mushroom tip obviously round and full as the soft length of it curved up her thigh to curl along the bone of her hip. Beneath its base were the globes of her full testicles, the skin of her scrotum was smooth and stretched around their size, and Doug was proud to have had each in his mouth where he lovingly suckled them until that spire of her thick penis grew to it's full size.

The image of her erection danced in his thoughts for a quick moment, bouncing as she walked towards him. It was a little over 11" long, more than twice his size, and much too thick for him to wrap his fingers around. Doug shook his head, dispelling the torrid pictures from his mind, as the fear of her desire, her need, to impale her huge stiffness into his spread and tender butt cheeks crept in. Up until now, Fiona had respected his not being ready, doing everything else he could to pleasure his girlfriend and tend to her needs.

Even if those needs were very frequent and rough. But, that was to be expected when your girlfriend is a still-growing giant. Doug had thought to give her his anal virginity for her birthday, but he chickened out, giving her a necklace instead. Fiona had said she loved it and wore it ever since.

"Is this good?"

The amazon teen was standing up against the wall, stretching tall to make sure the measurements would be accurate. Doug took a breath and stepped up to her, craning his neck to look up at her loving face. She was nibbling her lower lip, anxious in anticipation as she saw him pull out a length of measuring tape from his pocket into his small hands.

"Wow, I think you may need to get new sandals," Doug stated matter-of-factly, "it looks like you're no longer a size 13."

Glancing down the entire length of her tall body, she saw her huge feet encircled by a series of lines that her boyfriend had drawn on the floor. Her long toes, wiggling as they were, now reached a little past the 'size 12' mark, providing reasons as to why her new size 12 sandals had started to feel tight.

"Well," her large hand came down to grip her thickness through her pink shorts and gave the length of her soft cock a gentle shake and tender squeeze, "you know what they say about girls with really big feet."

Doug watched as her cock throbbed within the tight confines of its cotton prison. He could swear he had heard the threads creak as they fought against her size. Behind her, he knew that her shorts were pulling themselves between the taut round globes of her tight ass. Fiona had torn many an old set of panties and even popped out of a pair of jean shorts since they had started dating, but never a pair of stretch shorts. Shaking his head once more, he went back to his work.

"I ... I think I may need a chair for this."

Even reaching his hand as high as he could, Doug couldn't reach the top of Fiona's head. She just giggled down at him as he tried, refusing to help him in his endeavor. Grabbing her desk chair, picking it up and scraping it across the wooden floor, he moved it next to her and climbed up to stand on it.

"A little ... over ... 6'4"."

"Wow! I've grown almost two inches since we started going out, Dougie!"

Her face was beaming with pride, the length of her long toes wiggling their excitement. Doug's heart was starting to race, his penis starting to fill what little space was left in his underwear. Her brushed a long strand of her soft, blonde hair over her ear and nodded his agreement.

"I thought I had to crane my neck a bit more to kiss you these last few weeks."

"I wonder how tall I'm gonna be." Fiona's eyes were glazed with the wonder of it. "Christy has been catching up lately, glad to see I can still stay ahead of my little sister."

Doug thought of Christy for a moment, so much taller than even Fiona. Fiona was just as beautiful and much more mature, something that made his heart flutter whenever he saw her. But Christy could be rambunctious and just as rough as Fiona when they played together. And now that he was spending so much time around Fiona and her family, Christy had started to take notice of him - a fact that he had noticed with a fair degree of apprehension. He swallowed again.

"We're not done yet," he climbed down off the chair and put it back from where he got it, "we still have a few more measurements."

"I'm all yours."

Glancing down from her smiling face, after admiring the high cheek bones and her crystal blue eyes, Doug suddenly realized the bulge of her crotch had grown larger over the last few minutes. The curve of the tip of her thick penis had slid a few inches further along her hip bone, the shaft gaining a bit more girth. As he watched it, he could see his girlfriend's heart beating through it, pushing out more and more through the thin material.

"Can you ... take off your top?"

"I thought you'd never ask!"

Fiona's long fingers gripped the hem of her t-shirt, quickly pulling it upward. Her trim tummy appeared, followed by her very small, but very firm breasts. They bounced, relishing with their freedom, and her nipples continued to point out firmly, as if asking Doug to kiss them. He choose to play with the small indent of her navel instead, set as a tiny dip in the plain of her flat stomach.

"Alright, gonna measure your waist."

"Not gonna do my hips first?"

Her cock throbbed, stretching another inch up her leg. The tip had swollen slightly, testing the waistband of her shorts.

"No," he blinked at it, knowing that it knew he was there watching it, "I'll do it last."

His amazon girlfriend giggled again as the cool tape was wrapped around her midsection. The sound of groaning cotton sounded out, but Doug **** himself not to look down as he made sure the tape was taut.

"About the same as when we first did this a few months ago."

"I watch what I eat."

Doug laughed to himself; Fiona had a voracious appetite, but she also tempered it with plenty of extra-curricular activities. Reaching up, he began to slide the measuring tape upward, gently wrapping it around the budding domes of her young breasts. She had broad shoulders and a broad back, toned with muscle despite her slender frame, giving him a larger than average measurement. But Doug still blinked at the reading he saw on the tape, checking it three times to be sure.

"Fiona, it says here that you have a 38" chest, that's two inches more than you were before."

"My boobs are getting bigger?" Eyes wide in excitement, the giant girl stepped over to her mirror, almost knocking Doug over in her haste. There, she cupped herself, feeling their weight and bouncing them up and down with her warm palms. "My tops felt a little tighter, but I thought I was just getting taller; I thought my boobs had stopped already!"

She spun around, her little tits bouncing, as she touched one stiff nipple with a long finger to gently flick it. Facing Doug with a board smile, she looked down at him and jumped in joy. The last jump caused her growing cock to break out of the tight prison of her waistband. Free of it's confines, it suddenly surged upward, rising above her belly button before falling forward under its own heavy weight. It quickly stretched to its full and massive size, throbbing in front of his Doug's eyes as Fiona continued to bounce. He swallowed yet again, grabbing his ruler and taking a gentle, yet firm hold of her vein-marbled shaft. The giant girl took in a quick breath and moaned, the tip of her cock swelling to the size and color of a ripe plum.

"One last measurement."

The ruler was as straight and as hard as Fiona's big penis; but, the once 11" monster was now a little longer than the 12" ruler. Doug's best estimate placed her dick around 16 inches at this point. Apparently in the three months since they'd started dating, he's spent so much time with her dick that its growth had gone completely unnoticed to him, somehow. He looked up at his girlfriend's face, partially obscured by her aching length.