His guard down is post-orgasm serenity, my brother Bart let slip our darkest family secret: that making love to his daughter was not his first foray into incest. Once that was out, he told her everything. I understand, Molly has that effect on me, too.
But you'd better hear it from me, because Molly wasn't my first time with a close relation, either. For both Bart and me, the occasion was our sister Beatrice's eighteenth birthday, so many years ago.
It started out innocently enough. This happened back in more civilized days, when the legal drinking age was 18. Beatrice's birthday is in early July, and she was already taking advantage of the summer sun when I got home from my summer job in the mid-afternoon.
What a magnificent sight she was, lying on the chaise lounge, reading by the side of the pool, just beyond the shade of the trees and thick hedge that ran along the edge of our property.
Beatrice's luscious long legs glistened with sunblock. She wore a tight black bikini that complemented her waist-length black hair, and that also showed how tightly she could pack a bra.
Beatrice got her face from Mom's side of the family, rare violet eyes, a fine sharp nose, and thin pink lips. That view of her gave me the first serious thought of what she might be like in bed. We were alone in the house and our parents wouldn't be home from work for at least two hours. I felt myself getting hard for her.
But I put that thought aside; I still paid attention to society's rules then. Instead, I donned my swim trunks, grabbed a towel, a pair of champagne flutes, and a bottle of Great Western from the basement refrigerator. I draped the towel over my arm, concealing the flutes and wine.
"Happy birthday, Sis!" I announced as I joined her by the pool. With a flourish, I revealed what I'd brought.
"Oh, Bert, how nice," she said. "I was planning to have some with the birthday cake, but …"
"Why wait?" I replied. "Today, you're legal."
"In more ways than one," she said, and I felt a twitch in my groin.
But she didn't pursue the thought any further. I popped the cork, and some of the champagne burst into the air and drizzled down the side of the bottle.
"How phallic," my sister said as I poured.
"You seem to have cock on the brain," I said boldly.
"Maybe I do."
My hands started to tremble as we toasted her budding adulthood and sipped our champagne, much to Beatrice's amusement. Here I was, the wiser and more experienced older brother, and my little sister was deliberately tying me into knots. My cock was fully awake now, and thinking about possibilities.
"Do you have a new boyfriend we don’t know about?" I asked.
"Oh, nothing like that," she said, "it's just that I'm a legal adult now, and I haven't even-- should I be telling you this?"
"If we were on the phone, I'd be asking what you're wearing about now."
She laughed. "But you're my brother."
"But you're beautiful."
Beatrice poured another glass and downed half of it in one gulp. Now she seemed nervous, steeling herself for something.
"I don't know anything about men," she said at last. "The guys in high school are such geeks, and now I'm going to college in the fall and I'm going to be completely at sea socially. What do I do?"
I poured myself another glass. "So you want me to show you what to do if things get … intimate?"
Now she blushed.
"I don’t know what I was thinking," she said.
"Did I say no?"
"Bert, you're not serious!"
"Are you?"
Beatrice finished her champagne, poured a little more. She stared at me for a moment, and then got an eyeful of the throbbing mass in my trunks.
"I'm going in," she said, rising.
Beatrice was so lissom, sleek and slender, but I noticed her trembling despite the warm sunshine. Her dive into the water was as graceful as a dolphin's. I took advantage of her distraction to make a couple of adjustments and dove into the pool next to her.
"Wow," she said, coming to the surface. "My head's swimming."
"Come here," I said, taking her by the arm and pulling her close.
"Bert--"
I stopped her with a kiss. Her eyes bulged in surprise, but I was able to stand and envelop her in my arms.
"You shouldn't have done that," she said softly when I broke the kiss.
"Are you sure?"
This time, she let my tongue into her mouth, and her arms tightened around my neck. This time, she snuggled close to me, and her head suddenly snapped back in shock.
"Bert! You're naked!"
I laughed. My trunks were drying on the deck, and my dick lay hard against her belly, only a thin layer of cloth away from bliss.
"You should be, too," I replied, pulling the string on her bikini top. As it floated away, Beatrice's middling-sized boobs bobbed in the water. I folded my hand over one as she writhed in my arms.
"Jesus, Bert, what--"
I stopped her with another kiss. By now she was thrashing in the water, rubbing her pussy against my cock, and moaning. I took a chance and loosened my grip.
Now Beatrice looked at me intently and said, "You can't stop now!"
With that, I tugged the lower half of her bikini off, and now we were both naked in the pool. I dug my fingers into her round ass cheeks and rubbed her cunt along my cock. This time she kissed me.
Gently now, I found the entrance to her pussy and stayed there for a moment, giving her an opportunity to feel my cock before I shoved it into her.
"Don't wait, dammit!" she breathed.
I lowered my lovely little sister down my pulsating shaft. Beatrice winced as I stretched, then snapped, her hymen. She emitted a sharp cry and blood stained the water. I held her close for a moment, giving her a chance to get used to me.
"Give it a minute, Bea," I said. "It'll feel much better in a moment."
"Oh, yes," she sighed as the stinging pain subsided and a look of pleasure crossed her face. Now she wrapped her legs around my waist, and I stood stock-still in the water as my sister bounced and jiggled on my long, stiff shaft.
I let her run free, loving the sight of her boobs splashing in the water, her long hair waving on the surface as she thrashed her body against mine. We kissed and licked each other's face for the longest time, until sheer heavy breathing took over.
"Oh, Bert," she gasped. "I think I'm going to come!"
Now I began to move inside her, bouncing her tight, energetic ass in my hands even as she mewled like a kitten and twisted her body around mine.
Suddenly her head snapped back and she let out a passionate animal cry. Beatrice's pussy contracted around my cock, making me cry out as well.
"Now!" she snapped.
