My first encounter with my friend's dogI am 38 years old,

My first encounter with my friend's dog I am 38 years old,   and my name is Mercedes.   A single woman by vocation, I have fully lived my freedom, without complexes or taboos.   Enjoying the fact of being a woman, I have met men of all kinds, most of them my age, there has also been some young man who I did the favor of making his debut in love, and also some mature ones.   One of my best friends is Rocío, also single like me.   Rocío likes a little bit of everything, she prefers men but she is not disgusted by a woman if she is willing to do so.   I always made it very clear to him that I am not lesbian or bisexual and that he should not try it with me, which he has always done and has been respectful.   But we have a good time in each other's company, sometimes we go on vacation together and it is normal that if we are lucky and find a guy we like, we barely see each other on those days, each of us ends up in her hotel room fucking hard.   With Rocío I have come to know what had never even crossed my mind, practicing zoophilia. As I say, I have been liberal, but I had not considered that and it came up one day, unexpectedly, at his house.   It had been a few weeks since Rocío and I had not seen eye to eye. I had been away for work reasons. I called her when I arrived and she told me to come the next day to spend the afternoon at her house. He had to tell me something.    Rocío lives on the outskirts, a small house in an urbanization. He likes nature and the freedom that comes with being able to leave the house for a walk, ride a bike, in the countryside.    When I arrived, I found a new stranger in the house, who greeted me happily from the garden.   A large dog, mastiff breed, white, about three or four years old.  Well cared for, playful, intelligent animal, as soon as he crossed the fence he stood up on his hind legs, putting his front legs on my shoulders, to greet me. -            Quiet, quiet…! -Rocío said to the animal-. Hold still, you're going to fall to Mercedes... The dog kept running happily from one side to the other. - What's it called? -           Norton… -            Come, Norton, come…  The dog, called by his name, allowed himself to be petted, without stopping wagging his tail. -            It's beautiful.. Since when have you had it? -           About fifteen days ago.  My friend Ernesto, who you will remember, has gone abroad for a while. He couldn't take it with him and he asked me to have it. We went inside to talk about our things.   We ate something, we poured ourselves some drinks and, already a little in tune, we began, as always, to talk about our favorite topic, sex and the men we were conquering. Rocío, now animated, found me her last encounters. He liked to dwell on intimate, very lurid, risque details. She liked to practice everything with men. We got warmer without realizing it. It was a little hot and we were lightly dressed.   I noticed that Rocío was looking at me cheekily: -            What a shame you don't like women...haahaa.    I would fuck you now without control. -           Don't even think about it - I told him -, you already know that I'm not a dyke. -           Now, now. But I'm telling you, I used to fuck you, plus you're hot. -            Of course I am, but that doesn't mean we get involved. Norton walked around the house, in and out of the garden.    I was sitting with all my thighs exposed, to be comfortable I had taken off my street clothes and Rocío had lent me a short, white and very pretty truck.  The dog sitting on the carpet looked at me curiously.   -            He seems to like women…haahaa. -            Well, it could be, it could be... Rocío also laughed. She said it with reason, although I did not understand her comment at the time.   But I saw that the dog was approaching me and sniffing between my thighs, while giving me a lick.     - You're hot, Rocío said, and the dog catches your scent.     - Come on, it can't be... The dog will like female dogs, not women.     -  If they are trained, so are women.     - And this one, is he trained? - I asked, already a little scared. Rocío didn't answer, she just smiled.   We continue chatting and continue getting hornier.   I felt like masturbating, we had done it together before.  I put my hand under the panties and caressed my pubes a little, now wet.    Rocío licked her lips.  The dog didn't move from my side and whined a little nervously. -            It's getting hot too, said Rocío.   Don't you see, how the penis is sticking out? It was true. Under the skin of the animal the tip of the member protruded, red, dripping some liquid. I was becoming more and more suffocated.   The presence of the animal, looking at me and licking its lips, put me more in tune.   I opened my legs more and my hand entered my sex more.   It was already dripping. -           Don't run -Rocío asked me-, it's better that you try something new. -           What is that new? -           To the dog… -           Damn…What are you saying…?   To the dog...?   Do you fuck the dog? Rocío's new smile, without denying or affirming.    -            Do you know why Norton is getting excited? -            I have no idea, I replied. -            Well because you are wearing the nightgown that I wear when he rides me.   When I put on that nightgown he already knows what I want. I jumped, took my hand away from my pussy and when I took it out the dog began to lick it desperately. -            See?... He likes you, he likes your taste and your smell.   If you let him, he will fuck you like a machine, you will have the greatest pleasure you have ever imagined. -            And it won't hurt? I heard they have a big cock and a ball in the back, which is what they get attached to. -            True, but your vagina will adapt perfectly, don't worry.  Also, since it is the first time, I will control him and not let him hit the ball.   I was already doubting myself, and if I doubt, it is to fall into temptation.  For me it was trying something different, and the novelty was making me almost cum with pleasure. -            And how do I get on? -            Come, -said Rocío-, I'll place you. He made me turn around and get on my knees on the carpet, and leaning on the seat of the couch.   He helped me take off my panties.  He pulled my nightgown up to my waist.   I was left with my ass exposed. I looked back to see the mastiff completely nervous, growling excitedly. Rocío gave me advice: -            Relax completely.  You will first feel a great push, the animal, following its instinct, pushes it in suddenly, with strong pushes.   Then he starts to calm down. You will feel that it fills you with liquids, these animals cum a lot, before and during intercourse.   When you penetrate yourself you may feel some pain, but it is only a moment until your pussy dilates.   I'll open it a little to help you. He shamelessly put his hand on my pussy, with the excuse of checking on me. I let her do it, also justifying to myself that it was necessary to prepare myself.   He ran his fingers, checked my moisture, opened my sex by stretching his lips, and put two fingers inside, shaking them in circles. -            You are on your point. Norton is smelling your discharge and can't take it anymore. Rocío passed her right hand under my belly, leaving it close to my sex. He knelt next to me. With his left hand he grabbed one of my buttocks and pulled it open. In that position he made a gesture and called to the mastiff. -            Come on, Norton, come on, ride it….    The dog did not wait long.   I noticed how he jumped on me, with all his corpulence. It was huge. I felt his soft fur on my back and his front paws gripping me tightly around the waist,  holding on to my hips. His heavy breathing on my neck. And then some strong blows of the phallus on my rear area.   Strong pushes, fast, constant.  Frantic.  I wasn't right.  I felt a gush of precum between my buttocks.   The mastiff's kicks hit me on the clitoris, on both sides of the vulva, through the anus. The hand that Rocío had underneath me acted at the right moment.   He placed his palm appropriately so that the animal's member slid over it and went directly to my entrance.    - Ahhhhhhhhhhhhhhhhh……… I couldn't help it.   I moaned like a fifteen-year-old virgin who had just been deflowered.   I had had many members throughout my years, big or small, but nothing like this.   It seemed to me that it was tearing me apart, despite being lubricated. It was also a brutal penetration, all at once, to the bottom.  Pierced mercilessly and the mastiff didn't stop moving. Then I remembered the damn ball. -            Rocíooo… hold him, please, don't let him put the whole thing in me, don't let him put the bulb in me. -            Don't worry, honey, I'll do it... The animal, now with almost all of its thrust inside me, loosened its thrusting and pulling motion somewhat and became more relaxed. Now he was just pushing, leaning on his hind legs and holding me tightly by the waist. The sensation of pain was decreasing, I was dilating and my pussy adapted to that tremendous stake like a glove.   I began to feel the first pleasures. -            You like it, huh… how slutty you are… -Rocío told me, they are sarcastic—. -            I like it, yes...-I answered between gasps-.   I know I'm a bitch, but you don't need to remind me. Rocío continued with her hand properly placed on my pussy, with her fingers open and the animal's phallus between them.   That way I prevented the bulb from entering, but the damn thing was fooling me, what it was doing was waiting for me to relax. It had been a long time.   The dog was barely moving anymore. I was calm, resting on my back, breathing already slower.   I liked it.  And the animal liked it, without a doubt.  I began to feel very comfortable. So much so that I allowed myself the luxury of bitching with the dog, like the good slut that I am.   So I started some movements of the vaginal muscles, contracting them and compressing the dog's cock.   I was really surprised by the animal's intelligence. She captured the sensations perfectly, she made some grunts every time I squeezed her pussy and at the same time she gave me some affectionate licks on the back of my neck. Rocío laughed. -            He is delighted with you, Mercedes, in the end he is not going to love me…ahahaa I didn't answer.  I couldn't.  Now I felt something different inside me.    The dog wasn't moving anymore, like I said, but it seemed like he kept getting into me more.   It was simply the ball, the bulb, that inside me was already expanding.   I perfectly noticed the thick potato, how it grew in my pussy. He opened it to me without compassion.  Rocío continued with her fingers in my pussy and surrounding Norton's cock, but what she was actually doing was not preventing it from entering, everything had already entered, what she was doing now was preventing it from coming out, until the entire ball had fattened up. I protested, but without conviction. -            Look how slutty you are, Rocío, damn... You let me get the ball.   It's going to burst me. The mastiff is the breed of dog that has perhaps the largest cock.    Thank goodness I'm also a big woman, with a big pussy, otherwise I don't know what would have happened.     The animal already made some movement to try to get me off my horse and have its ass pressed against mine, but Rocío, an expert, held it a little.    I wanted the bulb to grow completely inside me to prevent it from coming out. The animal growled again, nervous.   He gasped, spasming.   And at that moment I felt the first jet of sperm.    Women hardly feel the ejaculation of men inside us, unless we are attentive, but that had nothing to do with a cumshot from a human male.   I felt everything filling me, the impact of the semen against my uterus, since I had it stuck to the bottom.   A long, hot stream.   I squeezed my vaginal muscles again and while the male came I did too, exploding in a deep, tremendous orgasm, like I didn't remember feeling. -            Ahhhhhhhhhhhhhhhhhhhh, ahhhhhhhhhhhhhhhhhhhh, ayyyyyyyyyyyyyyyyyyyyyyyyy, Rocío, Rocío, ayyyyyyyyyyyyyyyyyyyyyyyy. Always attentive to both me and the animal, Rocío held the mastiff, pressing it against me, so that we could both enjoy it more.   I gave two or three blows with my ass backwards, already completely relaxed, I only felt pleasure, despite having inside a phallus about 30 cm long and a potato at its base as big as the fist of an adult man. I sat down with my head on the seat, exhausted.   Rocío was now holding the animal, slowly, helping it turn around, while she got off of me. During the operation I felt two or three strong pulls, we were well hooked, and it hurt a little. I complained with two or three moans. -            Uffff, ahhh, be careful, be careful……. -            Don't worry, Mercedes, I've placed it correctly, wait, that's it……. The animal was now giving me his butt. His cock passing under the testicles, as if twisted, was still completely inside me, without being able to separate us. I was very pleased. -            How long does this last, Rocío? -            About twenty minutes, then it will run again and then it will cool down, until I take it out. Wait, I'm going to put up an old sheet. Under one of the cushions I had a sheet prepared for these matters.   He spread it between my legs. -           That, what is it for? -            When you take it out, a large amount of liquid will come out, staining everything. The carpet must be protected. -           Ah, good, good... I was learning a lot. -            Rocío…-I said in a honeyed and totally slutty voice. -            Tell me, darling… -            Do you let me put the whole bulb in you too? -            Well no, if I'm honest.  I have never completely dared. He put it in me once, but I made him take it out right away because I got scared when it started to put on weight. -            You will be a whore… And I am the guinea pig, right? -            Your pussy is first class, you can do well. I am narrower.  But in compensation you are enjoying it much more, I notice. -            I won't deny you, darling. I'm really comfortable. Know?.  It's a strange feeling. It is a continuous enjoyment of being so tight and so full. Delicious. And I feel like I'm totally full of liquid too, that excites me even more. I felt a kind of continuous orgasm.   Delicious.  I continued squeezing my pussy from time to time, to enjoy more of the huge potato that was embedded in my entrance.   The mastiff also continued to moan with pleasure when he did it. I lost track of time. I was sweating.   - Lift my nightgown, darling, I told Rocío. She pulled my nightgown up to my shoulders. I sat up a little and he took it out.   I was leaning with my arms crossed on the edge of the couch.   He now unhooked my bra and removed it too. My breasts hung, large, sweaty.   Rocío couldn't help it and started to put her hand on me. I left her, it was an exceptional situation. The animal penetrating me, and Rocío caressing me, kissing my back.  He now passed his hand under my body, imprisoning my breasts, swaying them from one side to the other.   He sucked my neck and ears. I rolled my eyes, unable to say anything.  I turned my head up, to the side, as much as I could, with my mouth open. Rocío understood well what he wanted. We kissed long, using our tongues.   Rocío had already undressed too.   She rubbed her breasts over my face and over my back.   One hand was on her pussy, masturbating like crazy.   The definitive orgasm was coming to me, the orgasm with capital letters.  I brutally squeezed the pussy muscles again and forced the dog's second ejaculation, which let out a small howl of pleasure.   Again the tremendous jet of sperm.  This second orgasm, with Rocío's kisses, the groping of my breasts, was much stronger.   And Rocío also came like a real slut.   She stopped falling on me a little, moaning also rapidly.   A triple orgasm, mine, my friend's and Norton's.   Perfect, wonderful.  Both we and the dog stayed still for a few long minutes.  You had to regain your breath and consciousness.  Little by little I noticed how Norton's member was loosening, it was shrinking.    After a while I heard a clear "plop" as the ball came out of my sex and then a long stream of sperm was distilling from my vagina to the sheet that Rocío had placed.  The amount was tremendous, I had not seen anything like it.  Now the mastiff was licking his penis to relax it.  I fell on the sofa, Rocío placed the sheet under my ass to avoid stains and settled next to me hugging me.   I let her do it, she gave me tender kisses and whispered nice things to me.   I fell asleep. Since then, my visits to Rocío's house are much more frequent. Kisses for all.