Recognizing your mother, your body instantly surrendered. Your arms stopped shaking. Your face gave in and formed a comfortable seat. Your mom's maternal buttflesh claimed it's rightful place over her son's face, subsuming it under her wonderful bum. She sighed and settled back, her hips spreading out over your neck and shoulders and in a foot in either direction of your face. Once again your mouth was thrust against your mother's asshole in a kissing position, your lips pressed intimately into her anus. The bedsprings creaked as they tried to push your head back up into the ass that had just pushed it down. She giggled, wiggling her bottom, checking the seal was airtight. She sighed and stretched her arms out over the headboard, smiling victoriously at the camera.
"How do you feel mom?"
A moment of wonderful silence passed by, then your mom bounced lightly on your face. "Incredibly close to my darling boy." She smiled honestly. "Have you got it honey?"
Your sister fidgeted in her pocket. "Oh yeah, I nearly forgot. Here mom." She tossed her mother a thick looking piece of bright red rope. "Make sure to tell him about it though!" She called as your mom brought the rope around her wide hips and leaned forward to better slide it under your head.
Looping the scarlet cord under your head once, she began tying it tightly around her hips, pulling your face deep into her butt-crack.
"Did you know sweetheart, that in certain east Asian cultures the red thread is particularly portentous?" She questioned happily as she worked. "According to them, the gods tie the red string of destiny around the body parts of two people who are destined to be tied together. No matter what either party does, the thread may stretch or tangle, but never break. Isn't it nice to think that no matter how you struggle, you are only destined to be the lover of your own mother's large backside?" With pleasure, she pulled the cord taught.
"You'll definitely not escape now son." She said to you but it felt more like she was talking to herself, as if taking pride in a job well done.
"Like he could ever escape your butt anyway mom! Do you have any idea how much bigger your butt is than his face!" Your sister yelled. "And besides, all your curves make you really heavy! You'll probably push so much blood out of his head he could barely move!" Suddenly you thought of a long, dark night under your mother's butt, her huge cheeks depriving you of oxygen ...
"Oh?" Your mom said, sounding curious. "How much bigger is my butt compared to your brother's face?"
Your sister's voice suddenly sounded very pensive to you situated under you mother's heavy weight. "Hmmm. Well when you were walking to the bathroom I could only see the very back of his head in between your cheeks. It's definitely fair to say his head fits into your butt-crack really, really well. And that's without you even sitting on it!"
"Well of course," your mom said smugly, tickling your belly with her long nails, "I am his mommy after-all."
"I suppose if you want a size comparison," your sister continued, "it's probably about two and a half times as big as his head."
"What, my whole butt?"
"No mom." your sister rolled her eyes, "Each cheek!"
"Oh stop."
"I'm serious!"
"Well," your mom began, "if my butt is so big, I'm really glad I've got my own son's face stuffed up it." She smiled kindly, leaning back and rubbing her feet over your prostrate belly.
"Is your face warm in there, sweetie? In my butt-crack?"
Your sister zoomed from your mother's smiling face down to were your neck disappeared under the curve of her cheeks, your face hidden somewhere in the pale cleft of her ass-crack. "Mom that's awesome, keep talking to him when you sit on his -"
"Honey I think that's enough for tonight. You can go downstairs and watch TV and help yourself to the fridge if you like, just don't stay up too late. Breakfast is at 8am tomorrow morning. Mommy's tired and I'm sure your brother wants to help me fall asleep while facesitting him, so go own now."
Your sister must have left, because you heard retreating footsteps and then the bedroom door click shut. You felt your mother shift, and before long her hands entwined with yours. Eager for familiar contact, eager for a sign that things would be normal again, you squeezed hers tightly. She responded by farting loudly right in your face.
"Oh, I had been holding that one in forever." She sighed contentedly, squeezing your face with her cheeks. She fluffed her big silk pillow before relaxing into it and looking happily down at your body, trapped under hers.
"My butt's much softer than any pillow, and you'll definitely get to sleep with so little air to breath." She added.
"Make sure to enjoy it lots, okay? I want you to enjoy things like this in the future, not going out on dates or playing with friends."
She wiggled her hips a little. You were powerless to do anything as it felt like an enormous bowl of warm jell-o was softly caressing your face. You felt the chemicals your mom had sprayed you with softly begin to proud your mind to have the proper reaction, and despite yourself you find yourself thinking you honestly didn't expect it to feel this ... good.
"You know you deserve this, right sweetie?" She said, as her arse and your face molded themselves to each other. She looked at her nightstand, where a picture of you and her, taken some time long ago, sat in the pride of place under the lamp. She smiled warmly, reaching over to the light before turning it off with a quick tug of the cord and settling back down for a nice, long rest.
You meanwhile existed in a strange new world where the only other entity was your mother's enormous, heavy ass. Surprised at finding your face in the spot on the bed where it normally rests, it used it's heavy weight to try and crush you underneath it, before realizing it was much bigger than you and simply molding itself onto your face. Your eyes, ears, nose, cheeks, chin, lips - the most important part of your body was now bound tightly to what your mother wiped with toilet-paper. Instead of air, you were forced to breath the gas from her ass. There was simply no other way to survive under this butt. The warmth, the smell, the weight and pressure and constant contact with her butt-flesh, it was all teaming up to affect your mind. This beautiful, loving woman who gave birth to you, raised you, fed you and worried about you. Every conceivable thing was working in tandem to tell you that you were born to be part of her butt.
There was only your mom's enormous, heavy butt-cheeks pressing down into your face and the warm space you rightfully occupied between them.