Sarah, on the way back

Author's Note:

Only cost me a few hours of sleep. Worth it.

Filled bottle in hand, Emma almost made it back uneventfully before she encountered her sister in the hallway. She was wearing a cute, frilly blouse, and had some light touches of makeup on.

"Hey, I was just looking for you- oh wow." she giggled. "You've been busy, huh?"

"I can't help it!" protested the cum-soaked Emma. "I mean, what am I supposed to do? Not fantasize about fucking my hot sister and filling her up with my cum?"

"No, no, that's totally fine," Sarah said as she bit her lip. Her right hand went down to her crotch and started rubbing her exposed pussy. "I didn't mean anything by it. You smell great, by the way."

Emma watched her sister fondle herself. It was one of the many perks of walking around covered in her own seed; her sister loved it, and usually couldn't stop herself from masturbating at the sight. She wished she could join in, but if her mother caught her, she'd be in big trouble.

But she'd changed that, hadn't she? Now, she should be able to masturbate freely, wherever and whenever she wanted. Right? Something niggled in the back of her mind, though she wasn't quite sure what.

"Hey Sarah," Emma swallowed. "Want to masturbate together?"

Sarah immediately whipped her head around, looking around frantically for her mother. After a few moments, when it was apparent that they were in the clear, she lowered her voice to a whisper. "You idiot, mom's still home!"

Emma wavered. Had the command not worked?

"Don't you remember the last time mom caught us?" she continued, as she inserted a finger into her pussy. "You were grounded for a month!"

Emma winced. Their mother was not happy to find her children masturbating with each other. She'd been very clear: even though masturbating while fantasizing about having sex with her hot sister was completely fine, that sort of behavior needed to be done privately. Well, she hadn't phrased it exactly like that, but that was Emma's takeaway, at least.

Sarah, meanwhile, had gotten off much lighter. She could masturbate as she pleased of course, their mother wasn't unreasonable, but she'd been scolded for "going along with it". The sisters also suspected that Angela was beginning to catch on that Sarah might be harboring some . . . taboo feelings towards her younger sister.

They'd been a lot more careful since then, doing their best to act as "normal sisters". It was mildly frustrating to have to dance around their mother, especially when the most they ever did was masturbate together. But if Angela ever realized how many incestuous desires Sarah actually had, then she'd kick her out for sure.

"Sorry," Emma whispered back furtively. "Wasn't thinking."

"You really need to be - ah - be more careful," her sister chastised, pumping two fingers inside herself. "If mom catches us again, it - oh - it could end way worse."

"I know," Emma's gaze was locked on her sister's hand pistoning in and out of her sopping wet cunt, her cock throbbing. She was acutely aware of the worst case scenario.

Satisfied that she impressed upon Emma the severity of her little slip, Sarah moved on. "I was heading out anyway. Meeting some - mmmmm - old friends from high school." She paused her masturbation, frowning at her sister's throbbing dick. "Still dry?"

"Oh, I'm wearing all of it," Emma said. "I fantasized that it was you I was covering in my cum. That drained all of it out of me."

Sarah looked amused, though Emma noticed her pussy lips spasm. "You weirdo, that's what gets you off?"

Emma dropped her voice to avoid her mother hearing. "You can't judge me on that. Tell me you don't like seeing me like this."

Sarah shook her head, responding at full volume. "That's not the same. Any girl alive is gonna get worked up at that smell. Speaking of which, since you're dry, I'm just going to have to take the leftovers."

Using both hands, she scraped some of Emma's seed off of her shoulder. Collecting it carefully, she proceeded to apply it to her face and neck, then she stuck her hands under her blouse and massaged the remainder on her breasts, moaning softly. When she was done, she looked back at her sister and laughed.

Emma's girldick was throbbing like crazy, trying and failing to pump precum out of her empty sack. She stared at her sister, drinking in the sight. While not as excessive as her hormone-fueled fantasies, the sight of her sister, in the flesh, rubbing her girly dickcream on her face and tits, those glorious, perfect tits made her heart and massive girlmeat pound.

"This'll give me a better scent than any perfume," Sarah smiled, then dropped her voice. "It'll also keep me horny enough to masturbate the whole day, reminding me of my sweet younger sister the entire time."

That pushed Emma over the edge. Emma moaned, and her balls managed to send out significant jet of precum through her throbbing girlcock. It shot straight forward, dousing her sister's crotch and hips.

Sarah's own moans mixed in as her sister's pre crashed against her pulsing, **** pussy. "Perfect," she sighed, dragging her hand along her hip, coating her fingers in the stuff. "Fresh, straight from the source." She jammed her fingers, covered in her little sister's precum, deep into her pussy.

Sarah's eyelids fluttered for a moment as she furiously jilled herself off. Breathing heavily, she managed to regain her composure and giggled, "Thanks for the help, Em." Emma could only groan in arousal as her girldick throbbed eagerly in the air, as if trying to reach Sarah's pussy only a few inches away.

She watched her sister go downstairs and out of sight, who continued fingering herself all the way.

"Going out, dear?" she heard her mother's voice from downstairs.

"Yeah," Sarah sounded strained. "Just going to - oh god -"

She heard Sarah moaning as her orgasm hit. It continued on for a while, with Emma unable to pull herself away. She imagined her sister making those sounds while jammed on her girldick instead, cumming hard as she stretched her out in ways that no one else could.

Emma let out a strangled gasp as her overtaxed balls pushed out another glob of precum.

"- hah, yeah, just going to meet some friends." Sarah finished, sounding satisfied.

"Going at it again already? Didn't you just finish?" her mother sounded amused. Guess she wasn't satisfied after all.

"Just one of those days. I'll probably be masturbating the whole time I'm out, too."

"Well, go easy on yourself. You're already soaked."

"What, this? This is Emma's."

"Emma's." her mother sounded wary.

"It's not like that," her sister sounded exasperated. "She just stared at me till she started leaking, and I borrowed some to help me finish faster. You know, the usual."

"Ah yes, I shouldn't worry." her mother sounded apologetic. "Go have fun with your friends, and don't masturbate and drive!"

"I won't!" The front door opened, then closed.

Emma released a sigh, her permanent erection throbbing in the air hungrily. She'd just cum so much, and now it looked like she needed to masturbate again. Though she'd have to wait at least a little bit; her balls didn't fill up instantly.

Emma smiled. She was completely crazy about her sister, wasn't she? Other than her masturbation proposition at the start, and a few whispers here and there, it was a completely normal sibling interaction, and she was still driven into a horny frenzy. She was really lucky to have a sister as cool and sexy as Sarah.

Emma went back to her room, deciding to tinker some more with Master PC while her balls filled with cum again.