'Sup

Without a word being said from behind the door, it creaked open. Through the corner of your shower curtain, a dark blue flash of hair peered out amidst the steam.

"Sup, bro!" Crystal poked her head through the crack and looked towards you. Luckily, the sheer curtain on the shower had acted as a double barrier, limiting the view of you both to a light silhouette.

"Crystal! What the hell, I'm showering. What do you need?"

Your sister took your surprised exclamation as an invitation to enter completely, sauntering up to the adjacent toilet. Like a wary animal observing a predator, your ears perked up as you heard her nonchalantly pull her sweatpants down, before another slight crack in the shower curtain revealed her pulling down a bright blue pair of spandex underwear. Her porcelain ass swallowed up the string in the back, and you found yourself shaking your head in order to stop staring. Crystal's words further aided you out of your trance as her spandex made a distinct snapping sound to indicate she'd pulled her cock out.

"I have to use the toilet, and the other bathroom is 'out of order' after what Sarah did to it." Struggling to remember the incident, you did, however, recall that there was yellow construction tape blocking off entry to the other bathroom.

"Plus, not only is it something you've seen before, you can't see a thing through that curtain! I looked when I came in, believe me."

Crystal was right -- your sister was a hormonal, hippie-esque, sex positive girl, and had made a habit of walking around your household with little to no clothing on, aside from her usual sweatpants and tank top combo, _when _she was feeling so inclined. Her quip about dying her 'hair' to you earlier crept into your thoughts, as the other, more mysterious components of her 'bohemian' personality seeped into your brain, with the same consistency as the steam that settled daintily within the bathroom. The torrent of the hot water against your skin, combined with the presence of your now half-nude sister in the room created a thick fog of restrained lust; mixed with the steam, a sauna of sensation slowly began to absorb into your bodies.

Crystal was the first to break free from the silent layer of lust that seemed to be permeating the bathroom, in addition to the entirety of the house. "Fuck, Doug. Are you trying to burn something off of you? It's fucking hot in here." The characteristic ding of the toilet seat being propped up was quickly filled by the sound of Crystal taking a leak.

Trying to lessen the deafening sound of your sister relieving herself, you responded. "I like hot showers! Not like you don't take hour long sauna sessions yourself!" Crystal laughed as she finished up. "Sorry Doug! Had to go." Crystal left the bathroom just as untroubled as she'd entered, leaving a toilet bowl full of piss as a reminder of her entry. You scoffed to yourself.

"Ew, gross. She didn't even shut the door!" Deciding to flush before you had finished your shower so you wouldn't have to deal with the smell, you moved the glass door and carefully stepped out, on account of your still sore body. As you exited the shower, a soft cloth feeling tickled your foot, a knot in your stomach forming at the sight of Crystal's underwear and sweatpants lazily strewn in front of the toilet. Rolling your eyes, you picked them up and put them on the bathroom counter, before turning around and flushing the toilet. As the water swirled and cleared, the hairs on your back stood up a bit as you felt a pair of eyes on you.

"Nice ass." Your heart jumped into your throat, as you whipped around to see your half-naked sister standing in the doorway with her hand posted against the frame. Her tank top ended right above her belly button, exposing her milky-white stomach. Your eyes, as if drawn by a magnet, brought your attention to her complete lack of pants, exposing a bushy thicket of blue pubic hair, dwarfed by her long, ghost white cock, hanging down to just a bit above her kneecap. Her foreskin retreated halfway towards her thick pink tip, forebodingly swinging back and forth as it began to settle against the gravity from her walking back up the stairs. Crystal smirked as she walked up directly in front of you, with little regard for your personal space. She stopped, an inch away from you, her hot breath on your forehead as she stared intently down at you, before reaching for her clothing on the counter, still maintaining eye contact.

"I came back in to get my sweatpants and underwear, didn't want you slipping on it as you got out of the shower." She edged closer, drinking in the carnality of you two being naked. The air between you two was downright lecherous, your senses on overdrive due to the insulative nature of the steam within the bathroom. The sound of the shower hitting hot porcelain, her thick forest of pubes tickling your leg, and a pale, thick cock ominously brushing against yours, threw you both into overdrive. Crystal, content with her playfulness, moved her head a bit so that her mouth was against your ear.

"Told you I didn't just dye my hair." Crystal turned around and walked away in a flash of blue, her dimpled ass swaying back and forth once more, jiggling with each step.

Collecting your heart from your throat, you stepped back in the shower, and the hot singe of the water shook you once more from your trance. Your stomach, like a low rumbling storm that was collecting lightning, grumbled with intent. You miraculously finished your shower and towelled off before returning to your room. Sitting on your bed, still wet from Lisa's midnight conquest, you sat with your head in your hands for a while, rubbing your eyes in a futile effort to shake off any lust that might've stuck to you. You decided to get dressed and go downstairs; halfway down the steps you noticed your still half naked sister lazily spread on the couch, watching a TV show and fiddling with her pubes. Still frozen mid-step with Crystal not having noticed you, the thoughts of what happened last night with Lisa bubbled up from the depths of your stomach. You began mulling over some options. Do you sit down next to Crystal on the couch? Or do you try to clear your head and go for a run?