The change was just as instant as ever, but this time more explosive.
Rebecca's boobs instantly shot out four feet in front of her and swelled relentlessly. She was moaning as she grasped her growing tits, feeling her tit-flesh expand more and more. Her muscles all over rippled and swelled and grew, pushing into one another, competing for space that was already taken. Her traps rose up behind her head and then surpassed it. Her shoulders and delts turning into massive boulders of pure muscle that also rose to beyond head level. Her entire upper body widened and filled with more pulsing and ripped sinewy muscle. Her wails of pleasure were almost masked by the sound of her expanding bulk.
Rebecca's entire top half was fucking enormous. Her stomach had thinned out and filled with row upon row of abs that stretched round to her kidneys, at least a 20 pack by now. Her legs were small and frail compared to her upper body - although still the same size as before as they hadn't grown yet. It just looked like her upper body was growing at this point. Her tits surged out again and sent a ripple throughout her body, a ripple so powerful it made her orgasm.
A pool of her love juice formed beneath her as she came and came and came, her screams of pleasure echoing around the room. And just when it looked like she couldn't get any more massive, her body blew out with size.
Rebecca's shoulders knocked into the shelves now. Then as she let out a loose howl of orgasmic pleasure, her legs exploded with raw size and power, blowing her colossal body up to 11 feet tall. Her hips blew out once ... then again ... and then again, giving her back her sexy and powerful hyper-hourglass figure.
Rebecca's ass surged just as rapid and violently as her tits. Her calves exploded with mass to support her tremendous top heavy frame until her legs filled with so much mass they actually outweighed her top half.
Rebecca kept growing larger and larger, moans getting louder as she did. Her body looked as if it couldn't grow any larger.
But then it just did.
Her entire body blew out and added another ton of mass to her already gargantuan body, most going to her car sized tits and ass. Her beautiful, radiant face and hair were preserved in the valley of monstrous bulk that had enveloped her head, going on for 18 feet tall.
Her muscles' relentless expansion had knocked over all the shelves around her. Her body was beyond hulkish and going into the truly hyper levels now. Her body stopped shuddering and growing at a staggering 20 feet tall. One last howl of orgasmic rapture was all that was heard from this hulking, humongous mass of tit and muscle as she had one last squirt, releasing nearly 10 gallons of her juices all over the floor.
Rebecca collapsed onto her ass and tried to finger herself. Her arms were too massive to achieve such an act now. Her biceps even when unflexed mashed into her breasts.
"OOOOOOOOOOHHHHHHHH YEAAAHHHHHHHH!!! THE FUCKING RUSH!! THIS SIZE! SO FUCKING GOOD, LOOK AT MEEEE!! AHHHHHHAHAHAHAAAA NOW I'M FUCKING PUMPED, LOOK AT ME KATIE, THE MAGNITUDE OF THE POWER AND SIZE I HAVE REACHED IS BEYOND COMPREHENSION!! MORE! I NEED MORE!" screamed Rebecca, her voice booming, reverberating off the sheet metal walls.