#sistercest

i pull her head off my cock using the fistful of her hair ive been grabbing for the last 15 minutes, allowing her to cough properly.

"eugh," she splutters out. "how much longer-" she's cut off as i force her head back down, forcing myself down her throat.

"we're done when i say we're done, slut. maybe if you worked your tongue a little more, youd already be free to keep playing your new game," i sneer. despite the constant "lessons" i keep giving her (for free, too!), my older sister has barely improved at sucking dick. at least she knows how to make the view worthwhile, i think, admiring the arch of her back and her soft ass, so perfectly held up behind her.

i take a moment to ponder the full picture from the little viewer i can see on the camcorder. theres me, kneeling on my pillows, one hand gripping the cheap headboard while the other keeps a firm grasp on my sister's hair, holding her still while i rut into her mouth. my sister is laying on one elbow and her knees, wincing and gagging despite the fact that i can clearly see (and hear, for that matter) her fingers sliding messily over her clit, so carefully designed by world-renowned surgeons, just to be abused by a sister-fucking whore. the thought makes me throb, which she meets with a near inaudible whimper. if shed been born with that pussy, i would have had her knocked up before finishing freshman year.

i hear a small creak, and look towards the bedroom door that id left ajar after dragging her in here to record, and see a familiar black nose peeking through the crack at about doorknob height. i grin. today's the day.

our family adopted a mutt puppy when my sister started high school, to "train her to be more responsible, and encourage her to get off her computer every now and then." it didn't end up working out quite the way our parents envisioned. after a couple weeks, she'd given up on keeping up with his walks or training him, and i had to take over as his owner so mom and dad wouldnt put him up for adoption.

i spent a good 6 years training percy every useful hand-signalled command i could think of. sit, stay, heel, kennel, fetch, and of course, mount. our parents didnt see the point in neutering him since we had a completely fenced in yard with no dog park for 50 miles, and after trying (and failing) to manage his constant habit of humping every soft object he could climb onto, i began to experiment with redirecting him. to my parents, he "grew out" of his horny phase. to me, he became a co-conspirator (and a much cuter fucking-machine).

as percy starts to inch into the room, i start playing up the noise i'm making, fucking my sisters throat harder and faster to keep her from hearing the soft clink of a collar. i can see him sniffing the air curiously, tail gently wagging. as he properly trots up to the foot of the bed, i take my hand off the headboard and tell him to mount.

in seconds, he's jumped onto the bed and started grabbing at her ass. she tries to pull off of my cock, but i use both hands to hold her there, still rutting into her throat, which must be sore by now. shes squirming, pushing me as hard as she can in her weakened state, but notably not biting down. she could get me to let go if she really needed to. i shiver with sadistic pleasure.

percy has a firm grip around her hips now, paws latched under her with his hips wildly bucking, not quite used to her shape yet. i can see light red scratches already showing on her back. i'm so fucking glad i'm recording this.

"c'mon boy! you can do it! a little lower!" my grin is so wide it's offputting now. my little fleshlight has resorted to beating her fists against my thighs and choking sobs out in the brief gaps for air when i pull back. she almost screams as our sweet family dog finally hits his target.

his hips start moving faster and staying closer to her body. his back legs are moving frantically, scrambling for grip on the bed, her legs, anything at all and with no particular logic. i know from my own extensive experiences that he's already started cumming in her, warm, watery liquid pooling where her cervix would be, in stark contrast to my own cum, which i'm desperately trying not to unload down her throat quite yet.

i pull out for a moment, grip on my sister's head still harsh, and force her to look up at me. her eyes are red, although it's impossible to know whether it's from choking or from despair.

"p-please- AH!- make him s-stop- HAH! ah!"

"why should i? this is probably the most love he's felt from you since we adopted him, i think he's more than earned it."

she just stares at me, eyes deprived of light, face contorting briefly every few seconds when percy's claws dig in a bit harder.

it's too much for me. he's still humping her wildly, but i know that he's approaching his limit. i release one of my fistfuls of her hair to start stroking myself.

"i've wanted to do this for so long, you know," i tell her. "i've been molding you into such a fucking pervert that you get off on your fucking little sister raping you." i can feel it coming, hard and fast, as i work myself right over her tear-soaked face. "you had an out. you barely fucking fought back. its not like percy is especially- hah- strong." my hips start stuttering right after the dog's do. "god, i hope he fucking gets you pregnant. open."

despite the verbal abuse, she complies, opening her mouth for me to fuck it as she whines, percy's body relaxing over her, knot firmly stuck in her cunt. i force her nose so far in my bush that you'd think she was steve irwin, and groan while i cum down her throat, frantic grinding turning into slow, contented movements, before i pull out.

she gasps for air, coughing. i only realize she was grabbing my hips to pull me closer when she lets go of them.

i look at percy, lying on her and panting. she speaks softly.

"um... exactly... how long is he- nngh!- stuck for?"

"a while. i think he averages about 15 minutes nowadays, but he's gone 30 before."

"why am i not surprised that you've been fucking the dog?"

i laugh, loudly. "i gave up on trying to be secretive about it before we even moved out of mom and dad's place. i'm surprised nobody ever caught me, honestly!"

she whines as percy tugs, before eventually forcing his knot out, much to her displeasure.

"FUCK! i thought you said it'd be a while??"

"i said he averages, dipshit. learn to listen." i flick her in the forehead with my finger as she sits up to check that her goods arent damaged. i use the opportunity to turn off the recording and hook the camera up to my computer for storage. she grimaces.

"...is there really nothing i can do to get that deleted?"

"unless you want another more heinous scene recorded, then no. i won't upload it, obviously."

she looks a little relieved. i take the opportunity to follow up with "not unedited, at least. i'll take both our faces out of the footage, and it'll only go up on a private forum anyways. videos of you are always a hot commodity there."

she groans, putting her still-damp face in her hands. i sit down next to her on the comforter, running my hand over her hair and softly planting a kiss on her head.

"i love you. you know that, right?" i ask.

she doesnt respond. 5 seconds pass. 10. it's almost 15 before she says, "i know. i love you too.... and thank you."