I gave her a few minutes, and came back into the lounge. I realised that not only had she done this before, but that she knew precisely what she was doing.
In between the cushions of the sofa was a gap, only a few inches wide, but it went under the recliner mechanism and opened up below. She had gone around the back of the sofa, and squeezed under. From my position, all I could see was her face, looking up, wedged between the cushions, literally part of the sofa. If I sat on her face, put my asshole on her lips, my balls would rest in her eyes, and my dick on her head. I looked down, and exclaimed, "Jesus! Won't you suffocate?"
She opened her mouth, which was still full of my spunk, and said "no", but I just heard a gargled "mmmfnna". I knew then that she had done this so many times, as to get the angle just right, to allow a little air into her nostrils.
I stood, turned my back and looked down, between my legs. Lip shaking I spoke, "So you're not only my cumdump, you're now the part of the sofa that sticks it's spunky tongue up my ass? Fuck." And with that, I sat slowly down, gingerly, making sure my buttocks spread wide over her face, and my asshole landed precisely on her open mouth.
The feeling was incredible, absolutely heavenly. Her long, wet tongue probed inside my ass, and it felt like it was all the way into my guts. It was erotic, and nasty, but strangely relaxing too. I leaned back, arms behind my head and looked down. Through my open legs I could just see her eyes looking up at me, my balls not quite covering them completely.
I moaned, "Oh god, this is fucking fantastic, I'm gonna do this all the fucking time! I might not even get up when I cum, it feels so good!"
As I talked, she was darting her tongue in and out of me, spitting my own warm cum inside me and sucking it out, giving me a sort of cum enema. It felt amazing, and it wasn't long before my cock was twitching. The head, as that was all she was, could be multi-purpose I decided, so every now and then I would scoot back a couple of inches and lower my balls into the mouth, or a little further and fuck her mouth hole for a while. It was genuine heaven. As she moaned, sucked and rimmed, I leaned over to the side table and grabbed my phone, FaceTiming my friend Jeff, as I often did. Mom had been to Jeff's before breakfast to suck out his morning load, as she did every day and night for him.
I spoke into the phone, "Hey Jeff, you know our little cumdrain? Look what else it does!" I pointed the phone down, and Jeff saw mom's wet face under my cock. I heard him laugh as he said "Fuck, so you've finally made her part of the furniture? Like a cockhole built into the sofa!"
I kept the lens pointing down and moved forward, squatting hard. "Oh, not just a cockhole... there's a tongue deep up my ass, and it feels fucking incredible. When she comes over to drain you tonight, you gotta make sure you sit on her face afterwards, it's beautiful!"
While he whooped, I smiled, and said to Jeff, "watch this then!" And without warning I started to cum, spunk shooting out my cock into my other hand, filling my palm. All the time, mom's tongue was fucking my hole, encouraging me. I finished spurting, and without a word, stood slightly, and turned my hand over the face below, coating her lips, nose and eyes with globs of thick jizz as she licked and lapped her lips. Still smiling, I wiped my hand on her face and sat back down, my ass cheeks and anus now covered in thick jism as she slurped and sucked. "See, now she gets to taste ass and spunk together!"
I ended the call with Jeff, and relaxed for another hour or so, enjoying the warm feeling of mom's mouth welded to my asshole.
As I stood up, I looked down, the spunky mess of my mom's face grinning up at me. I shook my head, pretending to be truly shocked, "fuck mom, you're really not just doing this because you think I want it are you?". Mom's eyes widened, as she said, "oh god no, sweety, I love this. God, I'd have you sitting on my face all the time! Please? You can play video games, or sleep, my tongue right up inside you, please? Please let me? I'll rim your friends too? They can all use my mouth that way?"
I nodded, amazed at what a versatile oral slut my mom was, and over the next week or so, her tongue was up my ass for hours, I did indeed sleep with her head between my buttocks. On Saturday night we had our usual porn party, but as well as crawling around and draining dicks, we all took turns in sitting on her face and seeing how far she could get her tongue inside us. It seemed to make us cum more times, and that night she was definitely full of semen.
At night, to make sure she didn't accidentally come off my anus, she found a couple of pairs of pants, sewed them together into one large garment, and slid her head under as I wore them. I was snug and tight, pulling her face between my buttocks, her mouth literally stuck on my asshole.
If I rolled over in the night, she had to roll over with me, she was part of the pants. I was now sleeping, with my mom's head attached to my asshole, and I remember drifting in and out of sleep feeling her lick and suck, making oral love to my hole.
As I drifted off to sleep one night, on my side, mom busy chomping my asshole, I wondered what delights would come next!