You knew that your family all had big asses - with the exception of your older sister Meghan, who was secretly jealous that her kid sister had a much bigger butt than her. But your mom's rear-end was far bigger than even Samantha's, and now it was descending on your sleeping face!
You awoke with a shudder and a spasm as you found your breathing obstructed. A warm, heavy weight had settled down on your face and was busy pressing you into your mattress. Your lips brushed against the silk cloth of a thong and suddenly you realized who was facesitting you - your mom was very proud of her big bottom, after all, and only wore thongs and g-strings when she wore underwear at all. You wiggled your face, trying to escape, but your mom shifted her weight so that her big bum maintained it's airtight clamp on your face. Clenching her stomach, your mom forced a bubbling fart from her bowels into your open mouth and down your throat. Your belly ballooned cartoonishly at the sudden input of gas.
"Oh, that feels so much better!" Your mom crowed, squeezing another one out into your mouth.
"You know sweetie, your sisters have been complaining lately about my "morning gas." How smelly they've been getting and how I'm always stinking up the kitchen every morning. You were the only one who never complained about the smell. Not once! So I thought from now on I'll just fart on your face every morning, so it won't bother your sisters and you get to enjoy the smell of your mother's ass first thing, every day!" Your mom swung her legs up and laid them on top of you. Her entire body weight now rested on your little frame, mostly on your head, which was slowly being pushed into your own mattress.
"Ooh, your face is so nice and comfortable to sit on!" Your mother wiggled her ass, getting comfortable. "You know, you're getting to the age now where you really should have a girl in your life. But your sisters tell me you've never even perked up the courage to talk to a girl at school! A growing boy really should have that experience! I know dating your mother is taboo, but why not date my ass?"
You listened in silence as your mom laughed. "You're already a good fit for each other; your head fits perfectly between my ass-cheeks, and you love the smell of my farts after all!"
*BBBBLOOOOAARRRFFT!!*
Mom leaned down and began rubbing your lap teasingly with her bare foot. "Oh I'm just kidding sweetie!" But she didn't stop rubbing right away. Getting up she bent over, giving you a generous view of her vast cleavage. Laughing at the view of your face in the crater left by her ass, she helped heave you out of the mattress. "Besides, now I've got a reward for you!"
She slapped her foot down on your shoulder, and gently rubbed your cheek with it. "For being such a good boy, mommy's going to give you a treat!" All of a sudden mom's foot was in your face, and her five purple-painted toes wiggled against your lips.
"Now, open wide!"
Despite her large size, your mom's feet were extremely dainty, and they fit easily inside your mouth. Once, when all three of her children were crying your mom had given her two daughters pacifiers to suck on and then shoved her big toe into your mouth. To her amusement you quietened down instantly and began suckling from her foot like it was the most normal thing in the world. Your mom obviously viewed this as a big treat, and something in the depths of your mind did so too! Her toes wiggled comfortably on top of your tongue. Your subconscious took over and despite yourself you found that you were sucking contentedly on your mom's toes once again. Your mom cooed and let you happily suck her foot for another five minutes before taking it out of your mouth.
"Now, lie in bed for a few more minutes and mommy will have breakfast ready." She smiled, patting you on the head.
"Or you could play hooky from school and help me with my gas all day!" She said, wiggling her backside as she left.