Foreword
: This story has nine chapters of about this length. The first four chapters are one-on-one with each family member, with dialogue suggesting faux incest. The last four chapters involve actual incest and group sex, including father-daughter, mother-son, and brother-sister. There are mild to moderate fetish elements, including feet, restraints, anal play, and spanking.
The Foundling
Chapter 4: Little Sister
Abby pulled up to the curb in front of her house and sighed melodramatically, although no one was around to hear it. She'd stayed out as late as she reasonably could on a school night, going to dinner with her team after the game and lingering over her food, but no amount of delay could save her from having to face the grim reality that awaited her when she got home. Shaking her head as she got out of her car, she made her way slowly to the front door, dreading the thought of having to share her personal space with an interloping orphan.
It was still hard for her to accept the idea that her brother and parents had been so eager to welcome the girl into their home, but she supposed it was easier for them to accept the new situation since they weren't the ones who would have to deal with it most directly. It reminded her of the 'not in my backyard' phenomenon she'd learned about in school, where people would support an initiative as long as they didn't personally have to deal with it. Abigail entertained a brief fantasy of forcing Shannon to sleep in the actual back yard as she entered the house.
"Hey, I'm home!" Abby called out, a little surprised that no one was downstairs watching TV or otherwise hanging out. It seemed too early for anyone to have gone to bed already, but from the faint noises originating upstairs, it sounded like that's where everyone was. Sighing again, she trudged to the second floor as ponderously as she could, not quite stomping, but making her footfalls heavier than they needed to be.
"Ugh!" Abby scoffed in revulsion, hearing soft moans and grunts coming from her parents' bedroom as she passed. It was pretty clear that they were having sex, and while it wasn't the first time they'd failed to ensure their total privacy, it was highly unusual for them to be so brazen about it. Abby thought that they ordinarily did things only on weekend mornings when she and her brother were sleeping in. "Gross!" she muttered, trying to walk as far from their door as possible, as if the extra few inches of space would help muffle the sounds of their passion.
Jake's light was out, but there was a dim blue flickering barely visible leaking from under his door, so Abby guessed that he was probably in his room watching pornography. She shuddered in disgust and crept past as quietly as she could. "What the heck has gotten into them tonight?" she mumbled, opening the door to her room and slipping inside.
The unpleasant evidence of her family's carnal engagements had temporarily made Abigail forget what awaited her, and she gasped in shock at how different her room looked when she finally saw it. She'd been expecting a bit of rearrangement from a second bed being added, and maybe a second dresser, but it looked like all the furniture had been replaced, and a large new queen-sized bed dominated the space.
"Welcome home, little sis!" Shannon said brightly, looking up from her phone as she laid sprawled near the center of the mattress.
"What happened to all my stuff?" Abby asked. She intended her voice to convey her outrage and indignation, but her tone quickly shifted to mere petulance, sounding more like whining than righteous fury.
"Don't worry, I moved your things into the new furniture, sis!" Shannon replied, patting the bed beside her. "Come try this thing out! It's super comfy!"
"But where's my bed? Where am I supposed to sleep?" Abby said, still sounding like a griping child to her own ears, which only served to make her more angry. She managed to throw her bag down forcefully, although it caused her to blush in embarrassment.
Shannon merely smirked, though whether at her display of temper or her question, Abby wasn't sure. "Don't be such a silly, little sis! This bed is plenty big enough for both of us!" the new girl said with a giggle. "Now, why don't you come pick which side you want!"
Abby stood where she was, staring at her unwanted new sister with disbelief and a feeling she thought should be horror, although it seemed to plateau at mild discomfort for some reason. She cleared her throat a few times but faltered before saying anything. Finally, after more than a minute of stupefied silence, she croaked out, "You're kidding, right?"
Shannon laughed merrily and replied, "Why would I be kidding? Look how much room there is!" To emphasize her point, she sprawled out sideways, and proceeded to wallow around, somehow managing to show off her ass as she did so. When she straightened up, kneeling near the center of the bed, both of her breasts had fallen out of her tank top shirt. Abby squirmed, unable to look away at first, before blushing and pointing.
Shannon giggled and tucked her boobs away, saying, "Oopsie! Good thing we're both girls! It's not like I've got anything you haven't seen before!" Abby got a curious feeling in the pit of her stomach, thinking to herself that her own breasts weren't anywhere near as nice. Granted, the two girls were close to the same size, and could probably swap bras in a pinch, but the foundling's nipples were a pretty shade of rose pink and seemed in perfect proportion to her breast size. Abby couldn't help but feel that her own areolae, which were larger, puffier, and almost the same color as her regular flesh, were in some way inferior. A flare of jealousy leapt up to join her simmering anger.
"You seem a little cranky tonight," Shannon said, her bright expression dimming to merely dauntingly cheerful. "Big brother told me you had a game today. I'll have to come watch the next one! But are you tired? Were you hoping to go to bed early?"
