A bit of both

"Is there something wrong, sis...?" Hannah asked after a while as they were still enjoying their breakfast, seeming curious rather than worried as she'd noticed the slight blush to her sister's cheeks.

"Uh, no... Nothing." Emma mumbled in reply, even as she was just reaching down to adjust the thing between her legs for perhaps the fifth time since she got seated. Her cock was still hard and throbbing inside of her underwear, threatening to find it's way out of it's confinement at any moment, and making her wonder how normal guys could possibly sit still while in the company of a hot woman like her sister.

"Okay then." The younger of the two shrugged and sipped from her glass of juice, but kept watching as her sister's attention remained diverted. Usually her sister was regarded as the smarter and more composed of the two, but currently there was something on her mind that obviously made her blush like a girl barely half her actual age. Whatever it was it must be serious, Hannah figured to herself, and smiled at the various ideas that popped up in her mind. Whatever it was, it was something she'd just had to find out about...!

"So, what's your plans for today then?" She wondered as they'd finally finished their breakfast, leaning forwards across the table to make sure she'd got her sister's attention. Unbeknown to her, the motion also caused her tight top to cling even tighter to her chest and reveal just a little more of her cleavage as well, something that Emma was made immediately aware of and making her cock throb harder between her thighs.

"Sis?" Hannah repeated, then finally noticed where her sister's eyes were drawn to, which both confused and flattered her at once. She had to admit she'd been looking at Emma several times in the past in a similar way, while being constantly envious of her sister's much larger breasts, but never quite so openly as her own were now being inspected.

"S-sorry, what did you say?" Emma managed to take her eyes of her sister's body for a moment, only to be stuck staring at the cuteness of her face instead, with those big green eyes and silky full lips. Then she realized how her sister must've noticed her staring, and tried to quickly excuse herself to leave the table.

"Hey, wait!" Her sister was immediately up on her feet as well, starting to follow her, but instead ending up catching her in the fall as the whole world seemed to spin before her eyes for a moment. "Hey, what's up?!"

"I-it's nothing...!" Emma grunted as she regained her balance, figuring there must be too much blood filling her cock right now instead of reaching her brain. And then she noticed how she was leaning on her sister, with one arm around her shoulder and the other clinging to the front of her top.

"Shit... I must have her...!" The thought passed through her head even as she tried to make herself let go, and made her mind go blank as she realized she'd actually said it out loud.

A moment later she looked up once again, to find herself in a tangled mess on top of her sister, her lips pressed tight to the other's and her hands working desperately to get them out of their clothes! And Hannah meanwhile seemed much too stunned to try and resist, simply staring back into her eyes while the kissing, groping and stripping of her body continued unhindered...