"Pfft… pfft…"
Two loud, wet farts suddenly escaped from Mom's still-gaping anus. Because she had been forced to eat so much filthy stuff all day and her hole had stayed wide open for hours, her stomach was completely upset. Now, with her ass stuck high in the air, she couldn't hold it in anymore, and two smelly farts burst out right in front of us.
"How dare you!" Vivi's face instantly turned ice-cold. "You disgusting pig, you dare fart right in front of your owners? Do you want me to destroy that stinking asshole forever?"
"G-Grandma, please… please have mercy on this worthless bitch!" Mom's whole body started shaking with terror. "This slutty granddaughter is willing to accept any punishment… please, please don't ruin my asshole!"
"Pfft… pfft…" Two more wet farts slipped out. The fear made her lose all control, and she farted again while begging.
"Grandma, dear Grandma… this bitch really didn't mean it… my stinky asshole just won't listen to me anymore… please don't be angry…" Mom's voice was breaking, her body trembling harder than ever. Her open anus winked and twitched wildly, and her pussy started spasming too, clear juices dripping onto the floor. She was so scared she was on the verge of pissing herself.
Vivi suddenly burst out laughing. She reached down and slapped Mom's soaking pussy hard, making the juices splash everywhere. "Hahaha! Linda, I never knew you could be this pathetic! Look at you, scared to death just because of a few little farts!"
She wasn't really angry anymore. She kept playfully kicking Mom's dripping pussy and swollen clit with her small, stocking-covered foot. "Fine, fine… since it's your first day as my personal bitch, I'll let it go this time. But your rotten asshole really does need proper treatment. Lucky for you, I know an old family remedy that will fix it perfectly. You'll even enjoy it."
"Thank you, thank you so much for your kindness, Grandma! This lowly bitch will serve you faithfully for the rest of my life!" Mom sobbed with relief.
Vivi nodded, fully satisfied. Then she gently stroked my thick, throbbing cock a few times and said with a sweet smile, "Baby, today is our first official day together as real mother and son. I didn't prepare a proper gift for you… so how about this: while I treat this bitch's asshole, she can clean your beautiful cock with her mouth. Consider it my special present to you."
Mom's face turned bright red with shame. "Grandma… please… could we maybe change that condition? Max is still my real son…"
Vivi's eyes turned cold again in a second. "Listen carefully, you stupid bitch. I am Max's mother now. You are nothing but my pet. From this moment on, you will call him 'Daddy' or 'Master'. Understand? And I still haven't punished you properly for farting at me. Do you think I'm someone you can disrespect?"
Mom realized she had no choice. Her voice shook as she forced out the humiliating words. "This… this bitch is willing to give Daddy oral sex… it's only right for a dirty daughter to clean her Daddy's big cock… please forgive this worthless slut, Grandma…"
"That's much better," Vivi said with a satisfied smile. "Now get up here on the sofa, kneel properly, and stick that slutty ass high in the air toward me."
Mom quickly climbed onto the sofa, knelt in front of me, and lifted her big, round ass high toward Vivi, completely exposing everything again.
Her soft, trembling hands wrapped around my hard cock. She looked up at me for just a second with tears in her eyes, then opened her cherry-red mouth and slowly took my swollen, leaking glans inside.
The moment her warm, wet mouth closed around me, pure electricity shot through my whole body. My cock throbbed wildly, almost exploding right then and there. Only because I had already cum once earlier was I able to hold back and enjoy the feeling of my own mother's tongue swirling around my cock for the first time.
"Oh dear, this is my first time at your house today, I forgot to bring my acupuncture needles," Vivi said, slapping her forehead in fake annoyance. She rummaged through her bag for a while before realizing she really hadn't brought anything.
Hearing this, I was a little surprised. "Stepmother, you know acupuncture?"
"Of course! There's someone in my family who does it professionally. I'm not a doctor, but I do have some very useful tricks up my sleeve," Vivi said proudly, lifting her chin at me. Then she opened her small makeup bag, searched for a moment, and pulled out a long, thin pair of silver tweezers. "It's not a big problem. We'll use these as a substitute for now."
I looked at the gleaming tweezers in her hand. They were long and thin, but still much thicker than real acupuncture needles. "Will this really work?"
"Of course it will! I can not only close this slut's asshole, but also make her feel like she's flying to heaven. Just watch me," Vivi said with total confidence. I got curious too, and leaned forward a little, enjoying the incredible feeling of Mom's mouth while also getting a perfect view of her dripping pussy and wide-open asshole.
"Watch closely, baby," Vivi said with a wink. She used the tweezers to make slow, gentle clockwise circles around the rim of Mom's open anus. The pink flesh immediately started wriggling and twitching in response to the cold metal touch. After about a minute, when the reaction slowed down, Vivi suddenly grabbed one tiny hair around the edge with the tweezers and yanked it out fast.
"Ugh… ugh…" Mom winced in sharp pain, her whole ass trembling. Because my cock was deep in her mouth, she could only make muffled groaning sounds. I clearly saw the tender flesh around her anus twitch and pull inward a little, starting to contract.