Chapter #4His room by: Unknown You both finally got back into your bedroom.
"Isabel, I just want to go to sleep!" You said grumpily.
"Aw, c'mon," Isabel smiled, pressing her big butt back into her brother's groin and wiggling it around, "Don't you want to play with me?"
Isabel had the body of a little girl but her hips and butt were ridiculously wide and round, so that when she wiggled them against her brother's groin it felt like he was being massaged by a giant, warm marshmallow. He spluttered and eventually said "O-okay..."
"Yay!" Isabel skipped ahead, getting the room ready.
She placed a pillow on the floor and then laid down on top of it so that her big butt was raised into the air.
Isabel had started insisting you do this everytime you play together - it was only fair after all! You were much older and better at the game than her! Swallowing your pride, you gently and cautiously wiggled your nose between her cheeks until you felt the warmth of her butthole on your nostrils. You hated what came next. Taking a deep sniff, you began inhaling directly from her anus, the foul smell permeating your lungs. As instructed you inhaled deeply for as long as possible, finally signalling with a thumb's up to your little sister after a minute solid of smelling her ass. Your eyes were heavy and your thoughts dimmed.
"Okay, I'm ready." Came your voice, muffled by her curvy cheeks. Isabel smiled and handed you your controller. She picked the game as you dutifully kept smelling her ass, having to watch the screen from over the curve of her bottom.
As usual you were having difficulty focusing on your game; the warm, sour smell of your little sister's asshole was difficult to ignore. Unlike your older sister Megan, Isabel had inherited her mother's big butt, something she loved to rub into Megan's face figuratively, while rubbing it into yours literally! She'd also inherited her mom's dominant personality, while you were a natural submissive and not good at standing up for yourself, and so even though she was only nine your nose had spent more time between her ass-cheeks than with any other girl.
The game was a racing game and a favourite of yours. You were a pro at it and could crush most courses in no time. You used to leave Isabel in the dust every time. However, once your kid sister's ass came in everything changed. It was distracting enough when she used to just sit in your lap, however; once you agreed to only play the game with your nose wedged between her cheeks your performance completely nosedived. You'd crash into walls and crawl to a stop, driving like you were drunk, and while Isabel never once got any better she started to beat you every single time.
By now your vision was blurry and you could only focus on the creamy white mounds of her cheeks. Sniffing your little sister's big butt so much had made you woozy. She was giggling at her victory, her blonde pigtails bouncing happily. She snaked her feet under you and rubbed them against your lap. You groaned in shame into her butt. "You're really not doing well, big bro!" She laughed, pulling down her panties so your nostrils were in direct contact with her butthole. "Smell that fresh-air!" She commanded. Dutifully, you took a loud, deep inhale directly from her bum. Your vision swam as she giggled, your breath tickling her bottom.
You carried on like this for 2 hours, Isabel winning every single game you played, and by the time she rolled you off the top of her butt you were passed out, spreadeagled on the floor. She stood over you and posed heroically, her young foot resting on top of your conquered manhood.
"You lost big bro, you know what that means!" She smiled, wiggling her derriere provocatively.
You let your sister take out her phone as you stand behind her and get down on your knees so that you were face-to-face with her big, plump rump. Turning the camera on as she signalled for you to go ahead, she filmed the whole thing as you pressed your lips against her butt-cheeks and kissed her big ass, smooching each cheek several times before moving on to the next one. Your sister struck a variety of sexy poses, ranging from faked surprise to smug grins. As usual, she passed them on to her friends, and your mom and sister.
'Isabel, I'm tired, I just want to go to sleep." You said, stumbling to your feet.
"What better way to sleep than with your nose up your little sister's butt?" She smiled.
"Maybe next time." You muttered, waving her away. You shambled out of her room and collapsed onto your bed. You opened your phone just before going to sleep to see a text from your mom; "What about mine, sweetie?  "
When you wake up in the morning, you see someone in your room with their ass pointed towards your face.
Who is it?
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