I finally confessed girlfriend, Mary, about my arousal-based growth condition. I was expecting confusion or disgust, but instead, Mary smiled and called me perfect. Later that night, I felt her arms coil around me and reach for my cock and balls as I heard her pur into my ear. "Grow, grow, grow~ I want to see just how big I can make you"
Having your girlfriend get so turned on by the fact that you were capable of growing purely based on your level of arousal certainly ignited a spark in your brain that immediately put your condition to use.
As she reached for your already quite sizeable package, she'd feel it pulsing, throbbing in her hand, eager and needy, her eyes widening and a big smile forming on her face as she saw your cock growing a few additional inches while hardening, and your balls growing like plump, juicy grapefruits. She had never seen anyone that big before, and was eager to see how much further she could take it.
"Grow for me. I know you want to... You don't need to hold back..." Her whispers further reinforced her previous statement, she was clearly eager to see the extent of your 'powers', so to speak. Your arousal was obviously skyrocketing too, as not only were you hard like a diamond, you could feel your balls churning up more cum like hard working automated factories, your body burning and sweating as if you were in a sauna, the moment was really getting to you, and you couldn't stop yourself from growing even if you wanted to.
Good thing you were very happy finally letting loose and growing, not needing to hold back in the presence of your hot girlfriend, but instead, only getting encouraged by her the bigger you got. Feeling her body press against yours, her pussy quivering on your leg as she saw your cock reach three feet in length, with your balls completely overtaking your lap, even if they didn't reach the knees yet, they would soon.
She made sure of it, by rubbing them gently, stimulating them and making you let out a sexy groan, precum dribbling from the lengthening tip of your dick. "Wow, I'm surprised you're not overflowing with cum already. These are so full and bloated. I've never seen anything this big...and yet I just want you bigger. Grow for me. Grow, grow, grow~ Even when you cum, I want you to KEEP GROWING~" She said, biting her lip at the end, unable to cointain her excitement as was clear by her tone of voice.
Your body would comply, and you felt yet another surge of growth flowing down your spine and right into your groin area, heating it up even more on the outside, causing your balls to finally overflow onto the bed and over your knees, and causing your cock to grow beyond even her height. With it reaching what you felt was critical mass, your brain struggled to process the sheer enormity of your endowment, and it caused you to burst in orgasm, the intense pleasure rippling through your very being as you erupted like a geyser, cum splattering all over the ceiling several times, but also coating your own cock, balls, and your girlfriend, who happily showered in the thick seed, tasting some of it, and rubbing her cum soaked body against your already overstimulated dick.
Somehow, while cumming, her actions combined with her loud moans of "MORE! GROW MORE FOR ME~!" as she rubbed her tits and pussy against your gigantic, monstrous pillar of a dick, you started expanding again, cumming more and more with few signs of slowing down due to the continuous growth...
It looks like she was getting her wish, and you were finally able to let loose your pent up arousal in the best kind of way~ Who knows how big you'll become~?
