[Author's note: A good portion of this story is an actual account of the intimacy between a son and his mother. I changed little of the text in the center section, though the beginning and end are not the exact words of the reader but are based on what he shared with me. Everyone in the account and in this story are over 18.]
Mom came home the day after Ava left for college orientation. At 20, she's a year older than me. Ava's my sister and we love to have sex together. It started when my mom and Ava would tease me with sexy lingerie. My mom is a lingerie model, and she got my sister into the business as well. The two of them were so hot modeling their underthings for me that I'd have to run from the room to jack off in the bathroom. Though a little unusual for a model, they both have big tits. Turns out that's perfect for the sexy things they wear at a photo shoot.
When my mom went away on a just such a shoot, Ava and I took teasing to a whole new level. She let me touch her tits and she watched me cum all over her. That led to us fucking each other and loving it!
Ava joined my mom on a job later. She confessed that we were in an incestuous relationship, and it got my mom so turned on that she and Ava made love. I was super excited for Mom to finally come home! I wasn't sure but suspected that my mom might be interested in getting more intimate with me too. Just the thought of it got me hard!
"Parker! I'm home!" Mom called out from the front hall.
"I'm out here!" I yelled from the deck overlooking our pool.
I watched her come through the sliding glass doors. She was carrying a bunch of packages.
"Can you help me with these?" she asked, nearly dropping the whole load.
"Sure, Mom," I said, getting up and adjusting myself to hide a growing erection. "What are these?"
"I was on a swimsuit job," she said, handing me several of the boxes and bags. "They let me keep everything. I even got something for you for later," she said, handing me a bag.
"What is it?" I asked, starting to open it.
"Not yet!" Mom said. "Take it upstairs but promise not to look at it until I tell you. Okay?"
"I guess," I said, more curious than ever.
I carried the stuff inside, set some down on Mom's bed and brought the mystery bag into my room and set it on the bed. It took everything in me not to look inside, though my imagination ran wild.
Mom grabbed some beers for us and met me on the deck. She was wearing a short white skirt that rode high up on her thigh as she sat. Her top was one of those clingy knit things that hugged her body so tightly that I could make out the outline of her large boobs - two perfect globes with small knobs on top - her tits, sticking out just slightly.
I'd always thought she was hot, and I enjoyed seeing her wearing nothing but a sexy bra and panties. Now that I knew she'd had sex with my sister - and our new friend Lovey - I was turned on even more. I was having a hard time not staring at the blue panties I could see up her crotch.
I willed her legs to move so I could get an even better view. Mom uncrossed her legs, and I saw her panty-covered crotch perfectly. When I realized what I was doing I looked up and saw Mom staring at me and smiling.
"Sorry, I uh ..." I stammered.
"No need to apologize," Mom said. "I know you were looking at my panties. I hope you approve. They're new."
"Um, they're great. I mean, yeah."
"Want to see them?" she said, opening her legs wider.
I stared at her crotch. Mom pulled her skirt up to her waist. They weren't panties she was wearing, but a thong.
"I love how they hug my lips," she said, pulling up on the thin fabric.
As she did that, I could see the outline of her labia - and something more - a dark stain that was quickly expanding between those lips.
My dick instantly responded, growing and traveling sideways in my pants as it got hard.
"You're ..." I started.
"Aroused?" Mom said. "Mm hmm. I've been thinking about you and Ava ever since your sister told me that you guys had fucked each other."
"You have?" I asked, looking up into her eyes.
"I've been picturing your hard cock pushing into her wet pussy and making her cum all over your dick!"
"Wow!" I said. "You've never talked to me like that."
"Well, It's about time," Mom said. "And it's easier for me to imagine it when I can see the bulge in your pants."
I looked down at my crotch and my dick had pushed up and out to the side quite a bit.
"Does Mommy's wet panties turn you on, Parker?" Mom said, reaching down and running her index finger up her slit.
I nodded numbly. This was every teenage boy's dream come true.
"Don't you want to take that cock out and stroke it for Mommy?" she said.
Boy did I! I stood and undid my belt and the button on my shorts.
"That's right," Mom said, rubbing herself. "Now undo the zipper. I want to see it. I want to see your hard dick."
I couldn't believe this was happening. My mom had never talked to me this way before, and it was fucking turning me on! I unzipped my shorts and pulled them down. My nine-inch cock was fully extended and bounced out as I pulled my underwear down.
"Oh shit!" Mom said, staring at my cock. "So much bigger than your sister described when she talked about you sticking it in her pussy."
I wrapped my hand around my cock.
"That's right. Hold your dick for me. How does it feel?" she said, her movements across her pussy lips quickening.
"It feels good," I said.
"Your dick looks so delicious," Mom said. "Do you like it when Ava puts it in her mouth?"
I nodded.
"Do you like to cum in her mouth, Parker?" she said, the stain on her panties now spreading.
I drop of clear liquid seeped from the edge of her thong and dripped down her thigh. She caught the drop with a finger and put it in her mouth.
"Do you wonder what Mommy tastes like now?" she said, licking her finger clean. "Is it turning you on to think about tasting Mommy's pussy?"
"Shit!" I said, my cock throbbing as I began to stroke it.
"Oh yes!" Mom said, putting her hand under the waistband of her thong. "Do you want to make Mommy cum?"
I nodded again, focused almost entirely on Mom's fingers working her pussy under her thong. I gripped my cock and pulled my hand towards me, sending thrills up and down my body.
Mom ran a hand over one of her large breasts, pinching the nipple between her thumb and index finger. Her nipples were now two tall buttons, sticking straight out from her chest.
"I'm picturing you fucking your sister's mouth and cumming all over her face," Mom said, rapidly running her finger across her pussy lips.
"Oh!" I groaned. I wasn't going to last much longer.
"Mm!" Mom moaned. Her hips began to move up and down and she pinched her other nipple. "Why don't you spray your cum all over Mommy and make me cum with you!"
I squeezed the end of my dick and pulled back. Suddenly, I felt an intense feeling of pleasure start at the tip of my cock and travel down to the base.
"Umph!" I groaned.
When the first white rope of cum erupted from my dick, it hit my mom's chest and leg.
"Ah!" she cried out, her pelvis arching up into the air.
A second rope shot out and hit her in the face.
"I'm ... fuck ... I'm ... AHHHH!" she cried, her hips bucking up and down.
A third rope landed across her knee and hit her thong. I was in agony and ecstasy at the same time. My cock hurt with pleasure as it sought release of its load.
"OH!" I grunted as a fourth rope shot out, hitting her in the face again.