Soon, she had shared with Hank her little secret as well. How she had grown up well off as well as well endowed. For as long as she could remember, her rich parents had hosted large 'Dinner Parties' that lasted late into the night, several times per week. She had always been forbidden to attend the 'after parties' - "Too young for such wickedness." Her Mother had always said, as the dozens of guests would retire into the large adjacent Ballroom and seal the doors shut. But Jan was curious, and by the time she was eighteen she had found a way to investigate.
She had found an attic alcove in the main mansion that opened to a service platform, directly above the high circular ceiling of the Ballroom. She had removed one of the light fixtures during the day, and could now see down into the whole expanse of the lavish room, through the hole. She had seldom been allowed into the Ballroom, at that point, but she was not prepared for the scene that unfolded below her, within it. At first it was just gross, all these naked 'old people', but gradually it became interesting -- her parents secret life finally revealed. As she watched, dozens of men and women, some naked, some in exotic lingerie or leather, clustered in groups around the Ballroom. There were backless love-seats, settees and opened futons arranged in a large circle around the floor. Every group had a single beautiful woman in the center surrounded with three or more eager men, this seemed kinky to Jan, but it made sense. Her own forays into sex with boys had been consistently not awesome. The idea of three or more huys at once was exciting to the young woman. So, even though they were all grown-ups, it was still fascinating to watch. Jan noticed that in the center of the circle of all the couches and settees was a large circular bed like a dias, and the naked woman in its center was by far the most beautiful of them all. Raven haired and very busty, it took Jan a moment to realize that this was her Mother. There were at least a dozen men surrounding her, their penises sticking right out, touching and kissing her all over. One was kneeling between her legs thrusting wildly. So this was kinky sex. Interesting.
Jan watched for at least an hour. The sounds and even the smells were strangely exciting. This was the big secret. As she continued to watch, men kept leaving the woman they were servicing and racing over to a medium sized crystal punchbowl on a table near the dias. They would touch themselves and then shoot sperm into the bowl, then move on to another beauty. After a while the bowl got about half full and all the sex came to an end. Everyone gathered around her Mother, still lying on the round bed, and performed a kind of ceremony with everyone chanting and walking around the bed while her Mother slowly, lasciviously rolled and wriggled on the bedsheets in a horizontal dance. The man she recognized as her father lifted the punchbowl and held it over his head. Jan's Mother laid on her back and pressed her large breasts together with both hands. She arched her back, threw her head back and brought her knees up as he slowly poured the milky white fluid all over her. On her breasts, on her face, all over her. She writhed in it and cried out alarmingly. At first Jan thought she was dying, but on closer inspection, the woman really seemed to be enjoying it. All the people chanting called her the Goddess of Cum, over and over as she kept moaning and wiggling. Soon, the rest of the women crept up and began licking the cum from her curvaceous body. It took a while since there was so much white stuff. That was enough. Jan crept back to her room but on the way, she realized that her pussy was soaking wet.
Jan had watched her parents a lot after that. It was different almost every time - costumes, dildos, clamps, S&M, water tanks. Often, it was just fifty men and her Mother. No other women. That was always messy, and afterwards her Mom would lay there, covered in white slime with no one to lick it off her, spasming and orgasming all night long. Jan wasn't sure if it was this lifestyle that she had grown up in that had made her so unresponsive to 'normal' sex. She guessed that she had inherited more than big breasts from her Mom. She soon discovered that sperm made her cum as well. Guess she was a Cum Goddess too. Oh, well....
So that was Jan's twisted secret. Born into a sex cult. Probably abused as a beautiful busty, young girl by many of the men who regularly visited her Mother. Hank knew it was unfortunate for her, but, it was what it was. Nothing to do about it. And it was fortunate for him. Jan was his ultimate dream-girl. She was into the very fetish that enslaved him, and the fact that she was so very sexually arousing had been an enormous bonus. But the best asset the girl had, by far, was her physical reaction to sperm. She loved it, true enough, but she had every reason to. It made her cum. She didn't seem to enjoy coital sex that much (always disappointed by the lack of sensation in her vagina, unless the man was exceptionally hung). But cum was magic to her. It didn't matter if it was pouring into her mouth, shooting up her ass, spattered all over her sexy face or squirted deep into her womb, it triggered her orgasms better than anything else she knew, And the more the better - she seemed to have no upward limit. Hank was manically driven to test that theory, absolutely.
If he was totally honest, this had been the entire motivation for his intense pursuit of the size-changing technology that had made him rich and both he and Jan into super heroes. Hank had fantasized hundreds of times about having her shrink down, as they both could now do, to a single inch in size and lying there naked as he knelt above her and masturbated. His ejaculate at that size would be like a relentless fire hose of spunk - engulfing her beautiful body entirely. Drowning her in thick, white goo. That would certainly test her upward limits and possibly even satiate his overwhelming desire. But he doubted even that would be enough.
This thought had been the driving force in his months of endless shrinking technology research. But it finally bore fruit. He had been ecstatic and could not wait to share it with Jan. Unfortunately, when he invited her to actually try this kinky use of their powers, she balked at the idea - the size proportional difference was just too great, and far too dangerous for her at such a small size. She said, although interesting, it made her feel far too vulnerable. His lust for this had been so fierce that he had considered forcing it upon her, but his feelings for the woman prevailed. There were times when his 'addictions' made him fear for his sanity. So he had settled for helping her to join him as a super hero and to subjecting her to ever-growing, bigger and bigger Bukkake sessions. It had been very disappointing.
But now, his long term plan could finally be achieved. The growth technology had worked and it could be easily fine-tuned and incremental, unlike the shrinking, which only allowed for one massive step - down to one-inch height. Now, If only he didn't scare her off. He must proceed very carefully so as not to make her feel too vulnerable. Then again, maybe vulnerable was exactly what was called for here, right now, in their bedroom. The thought made his cock thicken.
"I... see what you mean. Sounds very exciting." said Hank, glowing blue and growing again until he was towering over her at eight feet tall again. He gently grabbed her shoulders with his larger hands and, turning her, pulled her tight up against him. He had to crouch a bit so his hardening cock would press between the cleft of her ass. He bent forward, kissing her long neck and reaching deftly between her large breasts to undo the full-front zipper. He knew she wore nothing at all beneath the black vinyl cat suit, so he slowly glided the zipper down her body until it was far below her navel.
"Mmmmm, Mr. Johnson, you're getting so big." she whispered.
"It gets much, much bigger."
Jan's breath quickened noticeably as she felt Hank's whole body slowly begin to expand uniformly behind her amidst a dim blue glow. He stopped at nine feet tall this time. He turned her as if weightless and stepped out of his boxer briefs revealing a huge totally shaved hard-on, now fifteen inches in length and as thick as her forearm. His naked testicles hung there like two tennis balls in a pouch. The thought of what was to come had given him the hardest erection of his life.
"That's the largest cock... I've ever seen." Jan's voice was breathless with lust. She hadn't yet peeled off the skintight black vinyl but the widening gap of the open zipper revealed a provocative glimpse of her swaying breasts underneath as she moved slowly forward. His body was so large now that she just had to bend slightly at the waist to reach him. Grasping his impressive cock in both hands (it took both to fully encircle), she guided it to her parting lips. The tip was now as large as a good sized plum but she was able to engulf it with her practiced mouth, slowly sliding it toward her throat. It was just too big to deep throat, which had never happened to Jan before, so she contented herself with sliding the large head in and out of her hot wet mouth, again and again, as far in as she could, then sucking and licking as she slid it back out. Only a few inches of the large prick actually entered her, the rest of the shaft she held in both hands. Hank watched Jan's efforts with keen interest, his over-large hands caressing her breasts through the vinyl fabric making her nipples protrude visibly. He tucked one hand under and eased one glorious globe free, rolling and tweaking her engorged nipple with his thick fingers. Her breast seemed small in his hand now.