“Ohhh, shit…” said a voice that sounded like Dawn’s, and yet wasn’t Dawn’s. I turned my head to the side to see DJ writhing in clear arousal. Her T-shirt was shoved up above her big and growing breasts so that she could tweak her own nipple. And her shorts were unbuttoned and opened enough so that a hand could dip beneath and rub inside.
But it wasn’t her own hand; it was Brooke’s. My little sister manually masturbated her best friend, and was leaning over with her chin on DJ’s shoulder. Brooke’s eyes were heavy-lidded as she watched Dawn and I rutting against each other, no doubt partially imagining herself in Dawn’s position.
“I’m gonna fuck you now, Ben,” Dawn husked, drawing my attention back to my lover. “I’m going to lift up and impale myself on this thick piece of man meat. And I’m gonna give our little sisters a great look at your big dick spearing its way into my tight pussy.”
The younger girls gasped at that pronouncement, and their eyes were locked onto our crotches as Dawn raised herself to do just as she had said. DJ’s eyes in particular went wide open as she ogled my seven-and-five-eighths column of manflesh, and she held her breath as her older sister spread her moist labia around the mushroom head and then held the position for a few extra seconds.
“OHHH!” Dawn groaned as she sank herself down the first two inches, letting her head loll back as she concentrated on feeling my invasion. Now it was Brooke’s turn to gasp as she watched, enraptured by the sight of my thick dick penetrating inside of Dawn’s wet snatch. And then all three girls were staring downward as Dawn sank herself inch after inch until I was completely buried inside my girlfriend.
For a long minute, I just savored the feeling of being inside Dawn, the girl I loved. Even without moving, her tightness and the intimacy I felt for her were more than enough to keep me aroused and interested, and I rested my hands on her hips as we stared lovingly into each other’s eyes. And then after that time of reflection, I let my hands run up to cup Dawn’s big tits, a happy smile crossing my face as I played with my favorite toys in the world. Dawn giggled at my enthusiasm and then she began to lift and lower herself on me, now beginning the actual sex act as she whimpered out her pleasure.
Dawn and I last year had explained quite a bit about sex. Our younger sisters would ask questions about various body parts like the clitoris and a man’s testicles. We had explained the basic sexual positions and more or less informed them that any position that resulted in penetration worked, as long as the two participants enjoyed it. We ourselves mostly stuck to missionary and girl-on-top, because they just felt the best.
But there’s a difference between verbal explanation and show-and-tell. And for the first time, DJ and Brooke were actually witnessing us. DJ’d had sex herself before. Brooke had at least watched me and Brandi. So it wasn’t all new. But for the two 15-year-old girls, it was still spellbinding.
And the girls had not just been idly watching us. I glanced to the side and found that both DJ and Brooke had gotten themselves naked and had their hands all over each other while they watched us. Presently, DJ was suckling Brooke’s breast and fingering my little sister’s clit while the young brunette stared at her brother being fucked by his girlfriend. And when DJ moved her face up a little higher and captured Brooke’s lips in a firm, urgent kiss, I felt an extra jolt of energy lance through my cock as I thrust upwards and lifted Dawn a few inches, purely from the excitement of seeing my little sister locking lips with her cute young friend.
“Unnngh, Ben! You feel so good inside me!” Dawn crooned. “I love you, baby! I love feeling you fucking me! Unnngh! I’m cumming! I’m cumming!”
“Holy shit that’s hot!” DJ moaned while Brooke rubbed her clit. My sister removed her head from DJ’s nice, large breasts and turned to look at what DJ was exclaiming about. DJ herself continued, “My sister’s cumming on your brother’s cock, Brooke!”
She was. Dawn was in the throes of a powerful orgasm, her back arched, her neck muscles bulging, and her eyes tilted skyward. Dawn screamed out her climax to echo off the canyon walls, and soon I was joining her.
“Ugh! Ugh!” I grunted in warning, my hands back on Dawn’s hips as I clutched her body tightly against my crotch. My back rose up and off the blanket as I curled inwards, and then I erupted wave after wave of hot lava into my girlfriend’s vaginal cavity.
“Oh, Dawn!” I howled with delight, and together we showed our sisters what real happiness was all about.
A couple minutes later, after I was done spunking Dawn and we both finished off our orgasms, the tall, beautiful blonde collapsed backwards off me, her chest heaving upwards as she panted for air. DJ quickly moved over and on all fours, tilted her head to look at her big sister. “Can I taste it?”
Dawn got a goofy grin on her face and then nodded. And all of a sudden her well-fucked and satisfied expression changed into a contorted grimace of pleasure as she felt her little sister’s tongue darting into her semen-soaked channel.
Brooke was a little slower to react but no less aroused, as she moved to all fours above me and shyly asked, “Can I taste it?”
This was it. Yeah, Brooke had put me in her mouth before, back when I was unconscious and I’d thought she was Brandi. But this was the moment of acceptance, the time when we both would knowingly and willingly cross the boundary of incest. I searched my sister’s eyes for any signs of hesitation, and finding none, I nodded my approval.
And then it was my eyes rolling up into my head as I groaned with pleasure at the feelings of my little sister taking several inches of my still-sensitive cock into her hot little mouth.
I’d seen Brooke giving a blowjob to Perry once before. And her technique now wasn’t much different, leaving a lot to be desired as she hoovered me at a single speed while bobbing her head up and down. So once I got over my initial shock at knowing it was Brooke sucking my dick, I started coaching her the same way I had Megan so long ago, or the Sanders twins just recently. I explained how she was currently working to get or keep me hard after a recent orgasm, and how that differed from blowing me to get me off. I reminded her to watch her teeth, and I made suggestions for varying her technique and adding her hands into the mix. Brooke soaked it up like a sponge, and very quickly she had me at full mast and ready to go.
When she realized this, that scared little-girl look came into her expression and Brooke popped her mouth off my dick and stared at it wide-eyed in awe. The thick column, topped by a big mushroom head, looked rather imposing from up close and I had to admit, Brooke’s hand looked so small wrapped around it. I felt just a bit of my rigidity fading as I looked at Brooke become a little frightened at the possibilities of what might come next, but just as I was about to say something, she turned around and said, “OK, DJ. He’s ready.”
Dawn was moaning and holding her little sister’s head to her crotch while DJ slurped up the last of my cream from Dawn’s wet box. “Mmm, yummy,” DJ grinned.
“Cumslut,” Dawn giggled.
“Runs in the family,” DJ laughed. And then with a predatory gaze with absolutely no hesitation whatsoever, the 15-year-old blonde vixen crawled over to me and Brooke.
I kept my gaze on DJ’s pretty face the whole way, only briefly letting my eyes dip to drink in her nice body. True to Evans form, she had big breasts that hung and swayed pleasantly as she moved on all fours. She was still a little skinny around the hips and waist, not yet grown into full womanhood. And she had the same sparkle of arousal in her crystal clear blue eyes that Dawn showed me from time to time.