Super Little Sister (non futa)

Will didn't really think about his little sister much, his first year at college proving extremely busy. When it was almost time for summer break, his mother sent him an odd email. “Dearest William, just so you know before you come home, your sister has changed a lot this year. Don't be too surprised! xo Mom” He hoped his sister hadn't turned into a punk, a goth, or something else that would mar her innocent cuteness. What he found when he returned home was far from the possibilities his overactive imagination had constructed on his plane ride home.

“Welcome home, Big Brother!” An absurdly attractive girl stood in the frame. She stood 5'7 tall with flowing blonde hair, her voluminous bosom filling the doorway as it stretched her t-shirt to breaking. Her breasts took up so much space in her shirt that her perfectly flat, firm midriff was exposed.

“L-Liz?” Will was incredulous.

“What do you mean, of course it's me. You were away at school for a whole year, so you missed my um...growth spurt. Mom emailed you about me developing superpowers, right?” Elizabeth stated matter of factly, as it it were the most normal thing in the world to mention.

“You developed what? She didn't say anything like that, really.”

“She didn't even say what I can do now? Jeez, Mom's been so secretive about the whole thing. She doesn't let me do anything fun in public, either.” Liz pouted cutely, and Will saw she was indeed the same little sister he'd always known. Still, he gulped as his gaze was drawn back down by the almost tangible gravitational pull of her massive breasts.

“Jeez, Liz. What size are those now?”

“Gosh big bro, I know they're huge now...but I'm still your little sister, you know. I don't know what size they are anyway, I never wear bras since they're so super firm. I've had to be careful with them, since if I take too big a breath they'll tear apart my shirt and when my nipples get hard...well...you wanna see?”

Will gulped.

“Haha, just kidding. Anyway, why would you want to see my boobs when I can show you all the other cool stuff I can do. Mom is out getting groceries, so we've got some time. Soooo...name something and I'll do it.” Will walked into the house and laid his bags down as Liz talked. Sure, she might have had an incredible puberty so far...but “superpowers” was a bit of a stretch.

“Well, the first thing I think of with superpowers has got to be super strength.”

Liz smirked.

“Hmm...let me just pick up the couch with one finger...how's this? Haha, pretty cool right?”

“Wow! How much can you lift?”

“How should I know? I can barely feel this much weight, and I already told you Mom has been on my case all the time about not experimenting much.” Will had an incredulous smile on his face. This was actually pretty darn cool.

“Can you...fly?” Liz wordlessly responded by hovering crosslegged a few feet off the floor.

“How about heat vision?”

“Oh, my eyes can do way more than just that.” Will suddenly felt a little uneasy at what she could mean.

Liz motioned for Will to follow her out to the backyard, where the forest lay nearby. Will looked over at Liz as she focused her gaze at a huge tree nearby, and noticed her normally blue irises turn bright green and begin to glow. Suddenly, two thin beams fired out out of her eyes and quickly cut the tree in half before stopping. It began to fall over.

“That was the first trick I learned. Next was...” Liz turned to face the still falling tree.

Liz gazed intently, as her whole eyes began glowing green rather than just the iris. Instead of two thin continuous beams, two much larger pulses burst out at incredible speed and impacted the tree. It was completely blown apart and incinerated in a moment.

“The tricky part with those two is holding back. I mean, I've never really seen how much I could do obviously, but I'm basically using minimum power there.” Will was silently a bit horrified at the destructive potential his cute little sister could be harboring.

“The other thing

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