The "ground" shook underneath you as the twin mountains hanging off of Heather's chest slammed into the mattress. The impact rippled upward through her colossal tits, a sight that was as sickening as it was entrancing. You weren't disgusted by it—quite the opposite! At your scale, however, those gargantuan breasts looked less like anatomy and more like geography and parts of the landscape, especially parts as big as those, simply weren't meant to move like that. Fear, deep and primal, welled in your chest as your eyes followed the gorge of her cleavage up to her towering neck and kept going, all the way up to her soft lips. Watching them curl into a smile made your blood run cold and the look in her eyes froze you with fear. Her voice boomed like thunder.
"What's the matter, little one? I thought this is what you wanted!"
It had been, at least a few weeks ago. Your girlfriend had always been busty, one of the many reasons that you were attracted to her in the first place. Greed, however, got the better of you. You found a way to give some of your height—just a little!—to make her bust bigger. You figured an inch or two would be barely noticeable and the effects would be impressive and, seeing her grow with the first inch, you were right. An inch became two. The sight of your girlfriend bulging out of her bra made you dizzy with arousal. Two inches became three. She started having to constantly adjust her overworked bra, making her tits wobble in a way that consumed you. Three inches became four. Your eye-level was closer to her bust than ever which made it all the easier to appreciate the way she bulged out of her shirts in the new bras she was forced to buy. Four inches became five. Her breasts had grown so big as to distract you completely from her stories of unwanted attention and from the suspicious look in her eye as she scanned up and down your height. As five inches became six, you did your best to reassure her that it was just a late growth spurt, that she'd learn to love them. You certainly did. You couldn't keep your hands, shrunk smaller as her breasts grew even bigger, off of them.
But that was all when you were still several feet tall. Now you were barely a few inches and your little legs could only carry you so far as her car-sized hand reached down and plucked you off of the bed. Waking up from your nap to the room looming over had been disorienting, but that feeling paled in comparison to the rush of the wind around you as you were whisked through the air up to meet your girlfriend's towering face. Far below you, her breasts still look enormous, but you can barely look at them when her lips are so close and her breath is so warm. She tries to whisper, but at your size and at this distance, you still wince.
"Someone got a little greedy, didn't they? I noticed at the first inch, but I wanted to see how far you would go. When it became obvious that you wouldn't stop, I simply decided to speed up the process! You left the connection open, so all I had to do was pull. I'll be honest, when you first started forcing me to grow, I was not having a good time. I barely wanted to be the size I was before and you made me even bigger! I figured this was the only way to end it! I'm not sure how many inches you have left to spare! Now that I'm here, though..."
Heather bit her lip and shimmied her shoulders. Down below, waves moved across the ocean of tit underneath you. "I don't mind so much. But, don't worry, I'll make sure you get to truly experience these 'gifts' you gave me."
Her face moves away from you as she lowers you down, down, down towards her massive bust. Before you knew it, the walls of her cleavage were rising on either side of you, her fingertip pushing you deeper. "Are they big enough for you yet? I can always make them a little bigger for you, but I'm not really sure what that would do to you. I guess we can find out. Together."
Her cleavage closed in around you, plunging you into warmth and softness and darkness.
