>Hospitalized after a car accident
>wake up in an unfamiliar bed and see a dog staring back at you in the mirror
>nurses try calming you down and finally explain that a bad transfusion got you infected with lycanthropy
>the stress of this turn of events combined with the pain from the crash has your mind swimming
>able to focus again when the nurse tells you your emergency contact number for your parents didn't work
>she brings you a phone to call someone to take you home once you're cleared
>phone your sister, as soon as she hears your voice she's screaming your ear off for letting her worry where you've been for a week
>you've been unconscious for seven days
>after she settles down she asks why you sound so weird, you tell her about the accident and she's panicking again
>she blurts that she'll be there to pick you up in 20 minutes
>your heart starts racing trying to figure out how to tell her about your situation
>you try to think hard enough to make yourself change back but nothing works
>before you know it the door swings open and your sister is stuck at the threshold
>can't figure out what expression she's wearing and before the nurse can speak up she's on you hugging you tight crying
>you put an awkward hand (paw?) on her and try to calm her down while she's choking out how upset she is you let her worry and how happy she is that you're fine
>when her sobs finally subside you pull her off of you and ask the nurse if you're good to go
>she nods and tells you they can email the rest of the discharge paperwork if you sign a contract barring you from driving for a month
>the entire drive home sister is half-rambling half-complaining about how lucky you are and how unfair it is you had this happen when she's been trying for months
>you don't feel lucky
>you don't want to be stuck in a dog's body
>you just want things to go back to how they were a week ago
>when she pulls the car up to your house you both sit there in an awkward silence for a moment
>she mumbles something out, your new ears can barely make anything of it
>something about something done to her
>tell her to speak up
>she turns rose red and looks away before asking if you'd give her a bite
>you shrink away like she's hit you
>you ask her why she would ever want a dog biting her
>she looks you in the eyes with a sardonic expression before she tells you what she meant
>she wants you to give her the curse
>you realize what she meant by trying for months
>you're at a loss, don't know how to react at all to her proposition
>she says you don't have to now and to think about it before helping you to your room
>you can barely walk straight on your new feet and the extra foot of height makes leaning on her tricky at best
>when you get to your room she hugs you tight enough to feel her face through your fur
>she asks you to give it a thought before letting you alone
>your mind is racing trying to think through to logistics of everything
>how are you going to go back to work?
>can you even go back to being human?
>you must be able to right? You don't see wolves walking around ever
>you try looking into it online
>weird fetish sites are the only results
>people who ask how to get back are ree'd at by the autists in those forums for wanting to go back
>give up for now, get in bed
>go back to thinking what your sister asked you
>you don't want to do it to her
>you think she doesn't know what she's asking
>even if she did you don't think you could stomach biting her hard enough even to break the skin
>she had told you she'd been looking for a long time but the offers to get the curse online were stupidly expensive and she didn't know anybody with it already
>you're brought back to your room by a knock at the door
>tell her to come in, she's just here to ask you where to order food
>tell her to order for herself, you still aren't hungry
>she protests and says you need to eat after an accident like that
>finally relents and turns to leave
>you feel a lump in your throat before blurting out that you'll help her take the curse
>she whips around with a surprised look before rushing over to you
>she's rapidfire shooting off how happy she is and how long she's waited
>you palm her face with your huge new hand to get her quiet
>she pulls away and sidles up to you
>pulls her shirt collar away from her neck and angles her head
>ask her what she's doing
>tells you that she's getting ready for you to bite her
>tell her that you're not a fucking vampire
>she stammers out that she doesn't know how it really works
>you tell her you won't bite her
>she looks like a kid being told they can't have dessert
>you tell her you'll give her your blood
>it's how it happened to you
>she seems put off by the concept
>she says she doesn't want you hurting yourself for her
>you say you don't want to hurt her even if she wants it
>she relents and asks how you do it
>tell her to go get a glass
>she leaves and comes back with a starbucks cup
>give her a look before she squeaks out it's all that was close to clean
>you reach to your nightstand for your pocket knife
>hear her breath draw in quick and you tell her it's okay
>grab the blade in one hand and tell her to get the cup ready
>take a big breath before you yank it across your palm and feel it bite deep
>it doesn't really hurt much at first
>grab the cup as the blood begins to well in the gash
>seeing the blood come brings the pain to mind
>block it out and squeeze your hand to bring more blood out of the cut
>soon enough cup is about half full with blood
>looks awful but you still hand it to your sister
>say you don't know how much she would need but she says it should be enough
>watch her stare down into the red before you start to say she doesn't have to
>she inhales deep before bringing the cup to her lips
>tilts back and gags as soon as it reaches her mouth
>take the cup from her and tell her it's fine
>a little pissed that you just sliced your hand open for nothing but keep quiet
>she says she's sorry but it was just too hard
>tell her not to worry and order food before it gets too late
after an awkward dinner she comes over and hugs you and thanks you for trying to help her anyways and you head to your rooms
>dreaming of all sorts of weird shit in the night
>wandering the woods flashes to you fucking a girl in the back of a car and back to the last things you remember after the crash before returning to the girl in the car
>she's going down on you
>about to nut
>run a hand through her raven hair and gently thrust against her mouth
>blink and your hand is the weird dog paw you've been dealing with all day
>your cock is a dog dick
>the sight is almost enough to make you go soft
>but more you're thinking how unfair it is your cock is way bigger this way
>hear her gag slightly and your eyes shoot open
>room is pitch black but you can see just fine
>realize the sensations on your cock are still there
>yank your sheet off and a sort of abject horror comes over you
>your sister has almost your entire dick in her mouth, she's frozen in place and staring right at you
>you open your mouth in a silent scream and pull her away from your crotch
>cover your raging hard-on in shame, shiver as the slobber all over it cools in the air
>turn slightly to face her as she's covering her face in what you hope is a mutual shame
>ask her what the fuck she was doing
>she starts crying quietly
>you can't help but feel bad for her despite her disgusting act
>you ask her why the hell she did that calmer this time
>sniffling the tears away she says she felt terrible about you cutting yourself for nothing
>she went online to see if there were other ways to get the curse
>she read that sexual fluids are the easiest way to transfer it
>you can't even begin to unravel how that lead to her sucking you off in your sleep
>your mind is swimming with disgust and the hormones flooding it
>sister won't stop telling you she's sorry and begging you to forgive her
>seeing her so pathetic is leaving a lump in your throat
>you both sit there in relative silence for a long while
>swallowing, you ask her if she really wants to do it like this
>she spins to face you and says of course she doesn't want to do it with you
>say to her the cup of blood is waiting in the fridge then
>feel the bed shake as she shivers remembering it
>sheepishly nodding she scoots closer to you
>your face heats and a pit grows in your stomach
>you don't like this, you don't want to like this
>she asks if you're really sure, you lie and say if it will make her happy
>she gives you a quick hug before climbing off the bed and knee-walking over between your legs
>she puts her hands on the weird sheath you've got between your legs and starts stroking you
>you stop her and say you can't do it like this
>you can't handle watching your sister try to suck your cock
>she asks how to do it then
>your face is on fire from the shame when you tell her to lay on the bed
>she pulls her pajama bottoms off and spreads out on your sheets
>you still can't do this
>tell her you can't look at her like this
>she's frustrated and very visibly embarrassed
>she asks how you think she feels, more yelling it
>thinking about it for a moment before you grab her at the hips
>she stammers out asking what you're doing
>you flip her over and pull her to the edge of the bed
>you can't see her face now
>she asks if this is it then
>beg her to be quiet
>start getting yourself hard
>spread her ass to get your target in sight
>she's already a little wet
>you get the feeling she's more into the idea than she was letting on
>taking a huge breath and steeling yourself you take your cock in hand and bring the tip against her warm entrance
>feel her draw a sharp gasp at the prod, ask her if she's absolutely sure
>she sheepishly nods and you clamp your free hand on her hip
>slowly you press into her and elicit another gasp
>she's clenching hard and tight enough that it takes some work to get further than the first bit in
>feel her tense and relax over and over as you slide all the way in
>get to the bulb at the base of your cock that you doubt would fit in anything
>realize how long it's been since you've been inside anyone
>then the reminder that you're in your sister floods back and kills the mood
>she's shivering now
>asks you to start doing something
>beg her to be quiet
>double your grip on her hips with your free hand and slowly start to thrust
>she responds to your movements with hers in time
>soon enough you're in your rhythm
>you're breathing heavy and she's moaning softly
>she rolls her hips and grinds against the bulb ever time you bottom out
>you feel yourself growing closer
>quicken pace to something almost rough
>her squeaks turn into loud moans and words goading you on
>all you can do between pants is plead for her to be quiet
>you don't want to hear your sister talk about how she loves your dick
>she's shaking hard from your thrusts
>your hips smacking together is growing louder
>the pressure in your crotch is building
>with a final hard thrust you feel yourself unload in her
>she presses against you hard and with a grunt from both of you
>you feel the fat bulb at the base of your cock slip in her and lock you together
>she cums from it, shaking hard and rocking against you as you spurt more and more into her
>soon you feel your cum leaking out and running down your balls as she's completely filled
>you're both heaving hard from the effort
>you try to tug free which elicits another shaky moan from her
>you're stuck together
>the post-nut clarity has you realizing you're stuck inside your cum-filled sister
>she quietly hisses at the deep scrapes you left on her hips and ass but is otherwise exuding pure bliss
>you awkwardly apologize for the cuts but she's fully out of it
>some time passes and you try yanking free again to no avail
>your legs are aching from crouching this long
>you tap her on the back and pull her from her daze
>ask to slide up onto the bed so you can lay down
>she nods and you get ready to lift her
>moving with another full human stuck to your hips is about as awkward and difficult as you'd expect
>you tumble forward with her into the bed
>she gives another elated squeak as your still-hard member grinds against her spot from the shift
>you try another couple tugs to get free but can tell it's in vain
>reach for the sheet and swing it over the two of you
>after a bit of shuffling you ask what she's doing
>she doesn't say anything and after working it a bit she twists herself around still stuck to you
>she's facing you
>her perky tits are mashed against your fuzzy chest
>all she says is thanks before kissing your neck and burying her face into your fluff
>despite it all you find the act oddly endearing
>you know it won't help but one last time you grip her hips and try to pull free
>all it does is give her a rumbling moan vibrating into your chest
>defeated and exhausted you slip off to sleep with her