I’m not sure when this started or even when the idea first popped into my head…………ok that’s a lie. I guess it all started when I was about……12 years old. I remember knocking on my brother’s door in the middle of the night cause I was scared. When he didn’t answer I slowly pushed open the door and peeked in side. I can still remember exactly what went through my mind as for the first time I watch my brother having sex with another girl. He was young, only 2 years older than me; but the sights, and the sounds and especially the smell stuck with me all these years…….until today. 
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I smiled as my brother picked up the plate in front of me. “Glad you liked the cake.” I smiled back. “I loved it.” it was true, super fudge chocolate explosion was my favorite. He smiles again, and gives me a small kiss on the cheek. “Happy 18th birthday. Hope you have something fun planned on this trip of yours.” I grin; there is no trip, it’s just an excuse to spend the night at his place. I watch him as he walks away. I’ve always thought my brother was good looking but now……….he’s almost  perfect. He’s tall almost 6’1’’ with hardly any body fat. He’s muscular but not ripped his fur is a beautiful tan color with dark brown wring on his arms and legs; and even a few showing on his neck fur. In short he’s a perfect specimen of a saber tooth tiger fur. My hands shake slightly as they grab for the small bag I’ve brought with me to his house. If I’m gunna make my plan work, I need to start soon. “I’ll be right back, I’ve got to use the bathroom.” I just waves his hand at me as I move past him.
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Once inside the bathroom I lock the door. I’m shaking from a combination of nerves and excitement. I’m not ashamed to admit I’ve wanted this for a really long time. I felt jealous when I knew another girl was having sex with my brother. Half the time I wanted to run in there shove the girl off him and take her place; the other half all I wanted to do was watch them. (Which is what I ended up doing more often than not) shakily I pour myself a glass of water and gulp it down; there that helped with my nerves a bit. Slowly I undo the claps on my bag and pull out the small vile of medication I bought from the local pharmacists; another perk of now being 18. Slowly I read the instructions on the bottle and then get to work. First I squeeze out some of the paste from the vile onto my arm, before slowly rubbing it in. then my other arm, legs, neck, and……..I can't help but whimper slightly as I work the medicine into my breasts and hips. My body is tingling and I feels exactly like when I go into heat. Which is good cause that’s what the medication says it will do; send my body into heat. 
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Before I put my shirt and skirt back on I look at myself in the mirror. I’m tall slender, fur just like my brother’s, perky breasts………I’m hot. Taking a few deep breaths I look at myself for just a moment longer before I pull all my clothes back on and I stuff the bottle back into my bag; and then pull out the small blue pill and swallow that. After all I wanna fuck my brother; I don't wanna have cubs. Luckily I remember to ‘fake flush’ the toilet before I leave the bathroom and head back down to the living room where my brother is now sitting on the couch flipping though the TV channels. As I walk past him I notice him sniffing the air. Can the medication already be working? “Alice………are you ok?” I look at him and nod innocently. “Of course………..just excited for my trip tomorrow. I’ve always wanted to go to Vegas.” Ok that part isn’t a lie either; but it’s not the real reason I’m here. Sitting down on the couch right next to my brother I grab his arm and give him a small peck on the cheek; making sure he gets a good whiff of the smell that’s coming from my fur. The smell that the bottle says will help send the male in your life into heat too. 
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As I pull away I notice he’s adjusted himself so his crotch is no longer visible. Is he hard already? Don't worry big brother; I’ll help you with that soon enough. “Hey I have an idea. Why don't we play video games together like we used to?” I smile as he mumbles something. But he agrees and soon enough a game is loaded up and we’re playing. Of course I’m not really paying attention to the games we play. The medication said to have a lot of physical contact with your partner. So I take every opportunity to hug him, or touch him when he does something in the game. After half an hour I’m slightly amazed he’s not breaking yet. He’s got a pillow over his crotch trying (rather unsuccessfully) to hide the sizable erection he's sporting.  His fur is covered in sweat and he’s panting slightly; a sign I know means he’s deeply aroused. I know exactly how he feels right now. My own skin won’t stop tingling, my heart is racing and I’m pretty sure there’s a wet spot on the tong I’m wearing. Finally I’ve had enough; after 45 minutes I decide to take matters into my own hands. 
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After I watch my brother kill another orc I jump up and give him a big tight hug. “Big brother you’re so smart and good at this. I think you should have a reward…….I’ll go get us something to drink.” I let go of my brother and turn to go to the kitchen only to “trip” and fall to the floor. (Rather spectacularly I might add.) I make to land so my skirt rim rids up a little reveling the lacy pink and red thong I’m wearing to him. As I slowly climb to my feet I feel him get up and after a moment he helps me up. “Are you ok?” I nod, “yeah thanks………..ok now to get that drink.” I sway my hips as I walk away. As I enter the kitchen I chance a glance behind me……..my heart almost leaps out of my chest. Now that he’s standing up I can see the full size of his erection through his pants. It’s huge! As I pull down the glasses for the drink I hear him enter the kitchen behind me. I feel like prey being stalked by its predator…….my heart almost explodes as I feel him come to a stop behind me. For a split second all I can hear is my own heart beating and his ragged breathing. I pretend to be startled as I feel him grab my hands and pus them to the table……..his erection is pressing against my butt and I know my plan is about to succeed. 
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My brother’s breathing is ragged on my neck for a moment. After a moment I hear him speak……..he sounds exhausted. “you……….need to leave…….now……..please.” my body is shaking again; whether from excitement or nerves I don't know. “why? What’s wrong big brother?” god I sound like one of those tramps from the animes. “I think………. you’re…………….in heat…………I can't………..I’m your brother…………..” his body is shaking to,  every now and then I feel his hips give a small jerk forward……..I know he wants to ravage me; that’s what I want to. I shake my head. “No. I won’t leave you like this.” I feel his grip on my hands tighten, it’s not overly painful but it’s enough to get me to gasp and whimper; something than I know is turning him on even more. “Please………run…….if you don't………..I’ll……………….please run.” I shake my head again. “No….not till you tell me what wro-” but the rest of my sentence is cut off as I feel him growl. I let out a small yelp as he pushes my chest to the counter. His hands leave my hands and I shudder with excitement as I feel them grip my hips. I can feel him grinding his cock through his pants against my butt.
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“Don’t move.” I shudder as I hear my brother’s voice. It’s not the warm and kind voice I know, it’s rough, and need. I feel one of his hands leave my hips and touch the back of my neck. A moment later I let out an involuntary whimper as I feel one of my brother’s claws extend from his finger and slowly begin to cut through the back of my shirt, exposing my fur to him. My shirt falls away and I can't stop shaking and I feel my brother put his nose to my back. “You smell amazing.” “Th…thank you.” A moment later he grabs me by the neck and pulls me up so I’m against his chest. “Did I say you could talk?!” I shake my head franticly. I feel my brother turn my head so we’re looking at each other. His eyes have gotten small and I can tell he’s running on instinct and desire now. But his eyes soften after a moment. I watch as he slowly leans in and licks my neck. Again my will I let out a low purr, it does feel very nice. His hand leave my neck and instead travels downward; down my neck and to my chest. I bite my lip as I feel his push his hand under my bra and begin to fondle my breasts; soon enough his other hand joins in and reach back and fold my arms around his neck for support. 
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It feels amazing. Everywhere he touches my skin tingle. It feels like we’re both in an oven and it’s only getting hot as he licks my neck again. “Take it off………now.” I’m panting now and I reach back and undo my bra; letting my breasts fall and hang freely. “How does it feel?” I can only pant and moan…..it feels too good for words. But that’s not the answer my brother wanted. I hear him growl again and a second later pain flashes through my body as I feel him pinch and twist my nipples. “How. Does. It. feel.?” After each word he twists them again making more pain. “a.a.a.amazing!” I feel him let go of my nipples and go back to fondling. My heat is beating almost uncontrollably. I feel him stop licking my neck and a moment later I shudder and tilt my head to the side as I feel his breath on my ear. “You’re mine tonight.” I nod. But that nod turns into  deep moan as I feel him take my ear into his mouth and begin to gnaw on it. “Spread your legs apart.” I do as I’m told spreading them so my knees are apart. I gasp and whimper as I feel one of his hands leave my breasts and slowly…..agonizingly slowly travel downwards. 
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For a moment it stops are the top of my skirt. There I feel it begin to travel around my hips until it’s by my butt. “You have on a thong.” It’s a statement not a question and all I can do is nod. A moment later I yelp and jump as I feel him give me a fast spanking. “Naughty. Naughty. What would mom and dad say?” I blush at the thought of them finding out. I feel him shift. He grips my wrists and folds my fingers over the sides of the counter. “DO. NOT. MOVE.” After each word he gives me a small spanking, not hard but enough to make me whimper. I feel him step away from me for a moment and then the sounds of clothes being removed. I want so badly to look back and watch him, but I don't. He told me not to move. After a few moments I feel him return o my body; he’s down low now. I blush as I feel him kiss my lower back. “So perfect.” Again I blush. 
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Slowly I feel him start to tug my skirt away. He’s moving at just the right speed to drive me insane; not fast enough to rip them off, but not slow enough that it’ll take forever. I gasp as I feel them slip past my hips and drop to the floor leaving only the thin material of the thong I’m wearing between me and my brother. I’m shaking badly now, most out of excitement but also a little out of fear; I’ve never had sex before and……. But all thoughts are wiped from my mind as my feel my brother grip my hips. “Such slutty underwear. I think you need to be punished.” A moment later I start yelping and shaking even more as he begins to spank me. Each smack is hard and comes in lightning fast. Soon my ass burns and feels like it’s on fire; but I don't move instead I just bite my lip, despite the pain I’m in; I’m more turned on than I’ve ever been in my life. Even more turned on than the time I could my brother fucking the twin pandas we met on our family vacation. I don't know how long he spanks me for. I know that when it stops it stops very suddenly. For a moment I’m not sure why; then I hear it……..*drip*………*drip*.
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I feel my face burn with embarrassment and arousal as I realize what that sound is. I’ve soaked through my underwear and my juices are dripping onto the floor. I feel my brother shift and a moment later a sinful tingle runs up my spine as I feel his hot breath on my butt. “You’re making a mess on my floor.” Again my face burns but a moment later my head snaps back and I let out a loud “aaaaaaahhhhhhhhhhhhhhh!” I feel my brother’s tongue running against my crotch. My legs tremble and threaten to give out as he does it again. Involuntarily I spread my legs a bit further, I want more! He seems to get the message as I feel him slowly reach up and hook his thumb over the waistband. I shudder whimper and fight the urge to squirm away as I feel him pull down the last bit of clothing I have until I’m bend over, quivering and completely naked in front of him. I feel his strong hands grip my hips and hold them in place. A few seconds later a bolt of pleasure blasts through my body, strong enough to make my toes curl as I feel him begin to eat me out. 
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I pant, gasp, whimper, moan, groan, and bit my lip all at the same time. I can feel his fingers gently spreading my lips; giving him access to my most sensitive part. His tongue is a machine licking, lapping, and probing until it finds a spot it likes. Then it goes to work, rubbing, licking, and massaging that spot till I feel like I might pass out. I can feel the knot in my stomach growing tighter of tighter. I bite my lip and moan more urgently. He seems to know what’s going on, as he presses his tongue still deeper into my body. My tongue lulls out of the side of my mouth and sweat drips from my fur as I feel his tongue move deeper and deeper until I can't stand it anymore. I’m embarrassed to admit it but I orgasmed all over my brother’s face. I buried my face against the cold surface of the counter as I felt my juices flow freely out of my body over my brother’s tongue and face and down my leg to the floor. All the while he’s still licking and drinking them up like he’s gone without drinking anything for days. 
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My knees are shaking and I can barely stay upright as I feel him pull away after what like an eternity of pleasure. “You made a mess.” A moment later I feel grab me by the back of the neck and turn my head so I’m looking at him. The fur on his face is soaked and I can see globs of my juices clinging to his lips. I can't help but pant as the ghosts of pleasure still race through my body. For a moment we just look at each other then……..we kiss. He takes control instantly; his tongue forcing its way into my mouth before running along its roof. I blush as I get a taste of the salty yet sweet flavors of his mouth. How much of that taste is him and how much of it is me? Slowly I pull away from the kiss, a single train of saliva keeping us both connected somehow. Finally I look at my brother. His gorgeous body, perfect chest, abs, hips……the only bit of clothing he has left is a pair of black and red briefs with a rather obvious erection outline in them. She watched as he moved to remove his underwear but she grabbed his hand. “No…..not yet.” this time it was she who moved, slowly getting to her knees; blushes as she knelt down in the puddle she had helped to make. Gently she leaned in her nose filled with her brother’s musk. 
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Pressing the tip of her nose to his crotch she inhaled, filling her lungs with her brother’s beautiful scent. God the smell is amazing; it reaches into my mind and pulls something wild out. Gently I lap out with my tongue running it the length of the outline in my brother’s underwear. In response she shudders and groans. I do that a few more times before I take pity on him. Slowly I reach up and begin to grope and massage his balls. I’m rewarded with a loud groan and my brother shifting so he’s not leaning against the counter I was just bent over. His smell is driving me wild and it’s only a few more minutes before I can't stand it anymore. I grip his waist band and pull down his underwear so his erection is finally free. HE’S HUGE! Easily 10 inches long, pulsing and needing of my touch. I may not have given a blowjob before but I’ve watched more than enough porn to know what to do. Wrapping my lips around his shaft I enjoy the moan that comes from him. Slowly I lower my mouth around him, inch by inch enjoying every groan and moan he gives me until my lips touch his hips and his cock is completely inside my mouth. 
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For a moment I just hold it there the tip of it at the edge of my throat, but a low growl from my brother is enough to get me moving again. I start out slowly bobbing my head up and down the length of his shaft. Soon I start gaining speed and force. Before long I’m listening to a chorus of grunts, groans and moaning coming from my brother. I can feel his cock throbbing in my mouth and I can only guess how badly he wants to cum. I speed up one of my hands going to his balls to massage them, the other one going to his cock so I can work him just a bit harder. I pause for a moment as I feel his hand grip my head but he growls again and I resume my work. Soon enough his hips are humping into my face and his breaths are becoming ragged and shallow, I know what’s about to happen. But I whimper as I feel my brother pull my head away from his cock, it’s so tantalizingly close, if I reach out with my tongue………I feel the tip of my tongue just barely touch the head of his cock when the orgasm hits him. Luckily I close my eyes just in time as I the waves of cum spring from his cock and splatter against my face and mouth. 3 huge loads cover my face, only then does he let go of my head, my mouth is instantly around his cock. I swallow 4 more loads before he stops cumming. As I pull away I look up at him. 
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His eyes are closed, tongue is hanging out of his mouth, and he’s gripping the counter rather hard. But after a moment he looks own at me and grins. A moment later I yelp and squirm as I feel him lift me up not only to my feet but off my feet before he tosses me over his shoulder and carries me up to his bedroom. When we get to his room he tosses me onto his bed; ruining the perfectly made blankets and sheets. I watch as like a predator he slowly slinks onto the bed and crawls over me. I know what he wants; I’ve wanted it for 6 years. We kiss again this one is short and lustful. I feel him grip my shoulder and roll me so I’m on my side. He moves next to me; so we’re spooning. My heart’s racing again and I feel his hand slide down my hips to my thigh before gripping it and lifting it up into the air exposing. A blunt bolt of pleasure races through my body as I feel his cock brush against my entrance. It’s really gunna happen. 
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Despite how aroused he is when he speaks it’s in the kind loving voice of the brother I’ve known my whole life. “If I hurt you…..tell me.” I nod and reach back so I can fold my arms around his neck again, I turn my head to look at him and we kiss again. As our tongues dance together I feel his cock probe my entrance. I wanna break the kiss to moan but he moves so I can't. I feel the tip of his cock pop inside of me; my back arches against his chest. I try to break the kiss be he won’t let me. my grip on his neck tightens as I feel him slowly begin to push himself in. my face burns with embarrassment as I feel his free hand come around and spread my pussy lips so he can get into me with greater ease. He’s a fourth of the way in now and I want nothing more than to moan. My toes curl and uncurl and my vision is blurring as I feel more of him slide into me. My heart is beating in my throat and I feel like I’m gunna pass out as he slips half of his cock into me. Finally he lets me break the kiss, I manage to take a few gasps of air before he crushes his lips to mine again. Still he slides even deeper into me. My head is spinning and my legs won’t stop shaking I can feel his cock inside me; warm, pulsing, with still more to go. 3/4th inside me and I feel like I’m gunna cum just from this. He’s so big; he fills me up with almost no effort. 
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He breaks the kiss as his hips touch my butt. Finally I’m able to let out the ragged moan I’ve been holding in for what feels like forever. But that moan is soon joined by many more as I feel him pull out before swiftly pushing back into me. I feel one of his hands come around and grip my breast as he starts to fuck me; his other hand keeping my leg up in the air. My face burns with embarrassment as our bodies make a kind of ‘sloshing’ sound each time he pushes in. but no matter how hard I try I cannot stop the moans and whimpers that are coming from my mouth. Each time he pulls out I whimper at the feeling of loss, only to moan and pant when he shoves it all back in making my whole body quiver. The knot in my chest is painfully tight, and I know I’m gunna cum. When my orgasm hits me it’s like a freight train. My head arches back and I feel him burry his nose in my neck. “AAAAAAAAAHHHHHHHHHHH!!!” my head is spinning, my heart feels like it’s going to explode and every nerve in my body is screaming in pleasure. But he doesn’t stop he keeps fucking me all the way through my orgasm; extending it to a truly mind numbing amount of time. I have no words now, my body is exhausted, every muscles aches but he doesn’t stop. I groan as I feel with each thrust his balls slapping against my butt. It’s everything I ever wanted and so much more. 
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I don't know how long we fucked for. It might have been minutes it might have been hours. I know I reached 3 more orgasms and he didn’t stop fucking me during any of them. He just kept thrusting in and out making my twitch, and squirm and moan through them all. All I know is my mind is numb from pleasure, my fur is drenched in sweat and I want nothing more than to feel his cum inside me. I get my wish. I feel my brother’s cock pulse for a moment and his movements become much stronger, each thrust makes me breast bounce and my body shudder; then all at once he stops. I feel him burying himself as deep as he can get inside my body; pushing so hard against me that my hips almost hurt. Then I feel it…….a warm, feeling slowly spreading from my insides to the rest of my body. He’s buried his head against my neck and I can hear him panting as he rides out his own orgasm. I groan as the feeling grows. How can he cum so much after all this? I shudder as I feel some of his cum drip out of my body and leak down the side of my butt. Finally after what feels like an eternity, I feel his body relax. I feel him lean back and kiss the base of my neck. His grip on my body softens and he slowly lowers my leg while he pulls out of me. We’re both exhausted, neither of us have to strength to try to clean ourselves up or even more. It takes all the effort I have just to roll over so I’m looking at him. 
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His eyes are soft again. He looks at me. “I’m………sor-” but I cut him off with a small kiss to the lips. “I’m not. It’s the best birthday gift I’ve ever gotten.”