"Does that feel good, baby?" my wife half-whispered, tightening her grip, pumping a little faster.
"Yeah..." I cooed, throbbing in her hand, slightly writhing from her ecstatic touch.
We'd gone to my mother's for the weekend, that day being Friday. It'd been a while since we last visited, so staying over was quite nice. Miranda and I inherited my old bedroom, which was turned into a guest room after I left. Since my sister was just a door over, and because my mom was just down the hall, we were too afraid to have full-blown sex, as she was always kind of loud during. However, she couldn't keep her hands off me for the entire weekend, so she settled with using only her hands and mouth.
Miranda's hand squelched as it stroked my shaft, for she'd saturated me in lubricants prior to pleasuring me. It was such a wet, sloppy hand-job, and she had no inhibition about jerking her wrist upward and downward until I was weak and squirming. She alternated between her left and right hands, and also using both at the same time, pounding me with a hold that grew tighter and tighter as she progressed. During, I stared at her and her thin lips, slightly angular features, and rather impassive brown eyes beneath a pair of thick framed glasses. She was a brunette with a very serious, phlegmatic aesthetic, yet she'd the most perverted mind and ravenous libido of anyone I'd ever met. Of a rather lithe frame, she'd her top down but her bra on, having forgotten to fully disrobe her D-cups for me in her eagerness to put her hands on my dick.
It was not uncommon for her to talk to me whilst we had sex, either for her to express her lewd, deviant thoughts or to casually chat. While that may seem odd, it was strangely appropriate because we were both present and focused on one another. Now wasn't any different, though we spoke in lowered voices, lest anyone hear us.
"Your mom's butt is a little bigger than I remembered," she fatefully announced.
"What...?" all I knew is that she was mercilessly hand-fucking me, and then we were suddenly talking about my mother.
"What body shape would you say she has? I am going to guess pear, since, while her breasts are, you know, pretty big, her curves are huge. Your mom has a giant ass," as she said this, she didn't stop what she was doing, instead only going harder and faster.
"I don't know..." I softly groaned, shaking my head. "I don't know anything about body types, and I don't really know what you're talking about right now."
"What?" my wife blinked, tugging now with two hands. "Are you telling me you've never noticed the size of your mom's butt? I find that hard to believe, given how big it is."
"I don't know, I don't really check out my own mom, so..."
"It's not checking her out," she squeezed my base so blood would become trapped in my shaft, making me surge and swell, "it's just noticing what's right in front of your face. It's the first thing I noticed when I saw her, and I'm not some sort of lesbian, so if it isn't gay for me to realize the enormousness of her measurements, it's not incest for you to either."
"I'm about to cum, can we please stop talking about this, I don't want to think about my mom while Iโ"
But it was too late. The moment Miranda realized I'd reached orgasm, she stroked as hard and as fast as she could, though with one hand now, the other fondling my balls to help assist them in releasing built up sperm. Wrapping her lips about my tip, she received stream after stream of my ejaculate in her mouth and on her tongue. When I was finished, she'd a murky, opaque pool of gooey seed to swish around before swallowing, making sure I watched her perform this raunchy act. During my discharge, an image of my mom came into my mind's eye, and afterwards, rather than the sweet afterglow, I was filled with disgust.
"Ugh, I just came to the thought of my mom..." I confessed to her, my voice especially quiet, shuddering.
"Sorry, Hun," something about her apology was superficial, "but I thought you'd last a little longer. I didn't mean to ruin your orgasm."
I forgave her, as there was no use in being mad at my wife over it, though I was still suspicious. She wiped the lube off with a discarded garment and then we slipped into bed. The next day we would spend with my family and had to get up a little early. Having just been sexually relieved, it was easier to fall asleep, yet I couldn't help but contemplate the morality of what just happened. I'd closed my eyes when I started to release, so all I could see was what Miranda had been describing, and it continued to haunt me.
Nothing too exciting happened the following day. I caught up with my sibling while my mother and wife talked. She approved of Miranda, and the two had a certain fondness for each other, despite the fact that Mom was a very warm and tender person and Miranda wasn't very expressive about her emotions, being more of a thinker than a feeler. The highlight was when we looked at an old family photo album. It had every picture of any memory I could bring to mind, including the time we'd gone to the beach a while back. Out of nowhere, my wife asked to borrow it, that she could make copies of certain sections for us to keep. My mother agreed, and it was decided that we'd leave early the next morning to get them copied before the weekend was gone.
There was a certain incident that happened at dinner, however. My mom had gotten up to fetch a bottle of wine from the rack just behind where my sister was seated at the table. She bent down to obtain a bottle from below, and Miranda nudged me. I looked up to catch a glimpse of an enormous set of buttocks in a pair of jeans struggling to contain them, but quickly diverted my eyes. My sibling had seen this gesture from my wife, though thought it regarded her, and flashed us a look of suspicion and confusion. The night continued as usual, though, and we were finally alone in our temporary room.
"Are we on the same page yet?" my wife asked me, my cock in her hand, as I was half-way to climax.
"About what...?" I gasped breathily.
"Your mom's butt," she stated bluntly. "You saw it at dinner, right? It's massive!"
"Miranda...!" I scolded her. "Stop talking about my mom like that, okay? Especially while we're... you know, doing this."
"I didn't want to have to do this, but it looks like I have no choice," my wife said, pulling out a wad of pink cloth and throwing it upon my lower abdomen.
Unrecognizable at first, she then retrieved them, so that she may unbundle what I saw were a pair of wide, gigantic panties. I realized immediately, given the enormity, that they were my mother's. It was disconcerting to think about the woman I married rummaging through the dirty clothes hamper for my mom's underwear just to prove a point.
"Do you seeโ"
"Okay," I confessed, "they're big, she's... big. Are you happy now? What is even the point of all this?"
"I don't know," she bit her lip whilst eyeing the large undergarments, before putting them a few inches in front of her face and sniffing. "Wow," Miranda's expression immediately went semi-sour, pulling them away, "they smell like really pungent vagina. You've got to smellโ"
"Miranda, please, I'm not going to smell my mom's panties. What's gotten into you?"
"I think it's because we haven't had a chance to really fuck in a while," she looked up at me, shifting her weight around on her knees.
Without warning, she took my mom's underwear and wrapped them around my prick. Before I could protest, I was writhing from the cottony sensation of a pair of panties rubbing against my sensitive shaft. Two urges rose within me, one to demand she stop, and the other to give into the pleasure, to ignore the fact it was derived from something that'd been so close to, touching even, my mother's genitals. Despite the fact I was sickened by the incestuous implications, it did feel good, which was frightening and exhilarating.
"Miranda, stop..." I moaned, digging my nails into my thighs to fight the urge to push her away.
"Why?" she ceased her movements momentarily, "are you about to cum?"
"No..."