Bratty Sisters (F/f, hyper, huge loads, incest, noncon, one-shot)

Hannah’s voice came, oddly muffled. “I’m mad at you. You tricked me.”

“I’m coming in,” said Rachel, and did so. Hannah was lying back on her bed, all blonde and gangly, doing something on her phone. She stuck her tongue out at Hannah, then returned to her phone, ignoring her sister.

“What do you mean, I tricked you?” she tried again, after a minute.

Hannah looked at Rachel like she was a particularly stupid toddler. She pointed at her own modest bust, then at Rachel’s fairly absurdly well-endowed chest, then rolled her eyes.

Rachel suppressed a smile. “Oh, gramma’s biofeedback trick? I assumed you decided not to try it. What happened, did it not work?”

“Does it look like I’ve got basketball for boobs? Yeah, I tried it. Nothing in the chest department, though.” Hannah put her phone in her jeans pocket and sat on the side of the bed.

Rachel sat down beside her. “You put the ointment and the electrodes on? On your 18th birthday? Like I showed you?”

Hannah sighed. “Yeah, I did it exactly like you showed me. I did the meditations on the little leaflet. I imagined myself ‘growing, developing, exceeding all reasonable expectations’ for thirty minutes every night for a month. I smelled the fucking ylang-ylang oil. Teachers thought I was high on some new drug I stank so bad of that shit. No tits.”

“I’m sorry,” said Rachel, “I don’t know why it didn’t work for you like it did for me. Wish we could ask her.” Rachel paused, and looked up at her much taller sister. “I mean you’re still hella cute though, and you’ve clearly had a monster of a growth spurt. Over a foot?”

“Soft,” mumbled Hannah.

“What?” replied Rachel, “Hey!”

Rachel’s outburst came as Hannah suddenly swung one long arm across her sister’s smaller frame, knocking her on her back onto the bed. Quickly, Hannah kneeled over her sister’s hips, and pinned her arms behind her head with one hand. Rachel’s dark hair splayed out around her head, on the light blue sheets. Hannah smirked as Rachel wriggled and grunted fruitlessly, trying to get free.

“You used to do this shit to me all the time when we were little. It’s kinda fun being the bigger, stronger sister.”

“Fuck, you’re strong now,” said Rachel, impressed despite herself. “But you’re not bigger where it counts,” she continued, jerking her torso so her mammoth breasts jiggled back and forth.

“Ugh, bitch!” growled Hannah, and grabbed Rachel’s tank top with her free hand. Rachel struggled, but Hannah easily pulled the light shirt up and over her sister’s head. “What, you’re not even wearing a bra, you little slut!”

“Don’t need one,” said Rachel, “You wouldn’t either, if you’d followed gramma’s instructions right. Well, I guess you still don’t.”

“Grrrr!!!” cried Hannah, frustrated, and smacked her sister’s boob hard with her free hand, drawing a gasp. “Ugh, and they’re so firm too. How are they keeping their shape like this? This is fucking unfair.” She slapped the other boob, as if making a point.

“Let… me up,” gasped Rachel. Hannah ignored her.

“What the fuck’s going on with your nips, sis?” she asked. Indeed, Rachel’s nipples appeared to be growing erect, and then some:

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