It's step-mommy's birthday. You brought me a card to celebrate. But there's something I need to talk to you about. There's something that happens to the women in my family when we reach this age. And now it's going to happen to me. Step-mommy is going to grow into an enormous giantess ... and there's nothing we can do about it.
Then I start to grow! Right in front of your eyes, I become 10 feet tall! I'm horrified. I can't believe I grew this much this fast! My clothes don't fit, and I have to go to work! I tell you to come see me again tonight. We'll figure it out then.
After work, I'm still horrified with who I've become. I'm tall enough to reach the ceiling. You can see up my skirt, and my boobs are popping out of my shirt! And then I start to admit it ... I really don't mind being this big. In fact, I might even like it. I like the way people look at me, the way they jump with every stomp of my heavy feet. I love how powerful it makes me feel. It makes me feel ... horny.
The next morning, I call you into my room. I've grown too big for the house! I'm enormous, a real giantess. And I can't control my own horniness anymore. I rub my pussy, thinking about getting bigger and more powerful. The thought of it makes me cum. I decide to commit to it: becoming the biggest giantess that has ever existed.
A week later, I'm well on my way. I really am as tall as a building. I've hunted you down in the city I now rule over. The people, as tiny as ants, scurry away from my careless footsteps. I'm naked, touching myself, flooding neighbourhoods with my giantess squirts every time I cum. I was looking for you - my step-son, who's importance decreases every inch I grow taller. You stare up at me, a beautiful giant step-mommy, and watch me cum so hard I start an earthquake.
Finally, a year passes, and I've grown as large as I possibly can. I'm bigger than a continent, bigger than the Earth, bigger than the universe. All you insignificant humans pray to me daily. But somehow, all I can think about is you. I want you, my stepson, to be apart of me forever. I want to put you back inside of me and keep you warm and safe in my womb for the rest of eternity. You're so tiny and insignificant you have no option but to accept. Climb back inside of stepmommy and be with me forever!
