Carla getting ready for the holidays

This is my seventh story, and I've been using this site to tell the stories of what has happened in the past year since finding out that Carla was cheating on me.
My name is Carlos (fictitious); I'm a lawyer; 36 years old, 1.70 meters tall, good looks but no athletic physique. She has today 26 years of age, appearance of teenage girl, type nymphet, short, brunette (or almost mulatto), curly hair (sometimes smooth) just nice in the face, but with perfect body, small and hard breasts and very big ass, rigid and steep. With much muscling she had gained a made-up female body, but lost weight quickly this last month and returned to have a little girl's body.
Shortly after the separation, she started dating her gym instructor, a strong and quite tall dark-haired man named Renato. Even so we have been meeting to talk and fuck. She has told me the most sordid details of her sex life, recounting intimate details about her lovemaking with his current boyfriend, the menage he made with him and a friend (Katia), the various horns that she's already put on it in just 2 months of courtship. She also sent me by email photos of herself at motels. These stories leave me not only obviously envious but extremely excited as well. And she seems to have understood this, because she's been making a point of revealing herself more and more nymphomaniac. She even proposed that I leave my current boyfriend in order to stay with me as long as I agreed to let her go out with other men. Obviously, I would also be free to date others. But of course I did not accept it.
She knew that I was planning to go on holiday with my girlfriend in the Lake District (April 21-25), so she insisted that I leave her and take Katya, a friend of hers. Since I didn't accept this idea, she offered me an <unk>ménage à trois<unk> with Katya if I agreed to bring them. I got into a fight with my girlfriend to justify my absence, and called Carla for confirmation. It was late: they had already traveled to Angra. They invited me to join them because they were alone there, only in the company of Katya's younger brother.
I arrived home on the 22nd, and my first surprise was to meet Katia in person. She's much hotter than I had imagined: blonde, beautiful face and body, 5 feet 7 inches tall, gym-girl, looked like she was about 22 (but didn't ask her age). The second surprise wasn't pleasant at all: Katya's younger brother (named Kadu) isn't as childlike as I expected him to be; he must have been between 17 and 19 years old, a surfer lookalike, skinny, white, about 6 foot 8 inches long, half slow of reasoning. I had already predicted that the presence of this boy would make it very difficult for me to get my promised ménage; which in fact was confirmed. As Kadu was always around, Carla didn't even have a chance to mention the idea with her friend. The situation became more complicated when on 23/04 Kátia met up again with a <unk>friend<unk> at the beach whom she had previously been with during summer vacation. On the same day, Kadu also got herself a girlfriend on the beach, a brunette girl about 16 years old who is simply beautiful. Now my hopes were exhausted. We were in three pairs and there was no indication that I would fuck another cat other than my ex-girlfriend.
At the end of that afternoon, Kadu had disappeared from the beach together with her nymphet. When we returned home we almost caught them having sex in the double room where Carla and I were staying but they heard our voices, dressed quickly and left. Carla went into the room and noticed traces of blood on the sheet and called us to see it. The first conclusion was that the girl would have just lost her virginity. Katia warned that maybe not so, but that his brother's dick size could have done some damage to this little nymph. She remembered that he always wakes up with a hard cock, and reveals an enormous volume in his shorts. And she also maliciously concluded: "It is certainly bigger than Renato's" (remembering the poop of Carla's boyfriend with whom they had their menage). I still recalled that she could be at the beginning or end of her menstruation, but Katia smiled and said: "With Kadu's cacheton anything is possible. Poor girl!"
Kátia stated that she was very much in need of sex and asked if we could sleep in the bachelor's room that night, as she wanted to sleep with her "boyfriend"; his brother would be on the living-room couch. We agreed. After dinner Kadu went out to see his girlfriend. The two couples stayed together until about 10 p.m., when each one left for their own bedroom. Carla and I started making love quietly, but the noises from the next room began getting louder and more brazen, so we made scandalous lovemaking. And Carla knows how to make a scene in bed! We were so excited about that noise, I even thought of switching partners. She sensed my excitement and decided to do something different: she tied my hands with a rope on the headboard of her bachelor's bed. Then began an exquisite 69. My hard-on was such that I could barely contain myself from ejaculating prematurely. I pulled it away with my legs in order to prevent premature ejaculation. And then she said, "Are you holding back pleasure? His technique had evolved a lot. He swallowed all my stick and still stretched out his tongue to lick the balls without choking. It was perfect! The mockery came quickly, filling the mouth of the bitch. She swallows almost everything but leaves a trace in her mouth and comes to kiss me. I tried to resist, but because he was tied up, I finally gave in and tasted my own fucking.
The groans from the next room were full steam. The bed there creaked loudly, indicating strong, fast and rhythmic movements. Carla in obvious competition ordered: "Let's break this bed too". She sucked my dick again trying to revive it. But despite my excitement, the discomfort of being tied made him delay his reaction. Then she complained: Kadu was coming home. She got up and went over there, totally naked, leaving me tied to the bed. I struggled to hear what she was saying or doing, but sounds were mixed in with noises from another room. The next minute she was back pulling the boy by his erect pussy, already completely nude. He saw me bound, but didn't say anything. He sat down on the other bachelor-bed, and Carla knelt before him masturbating that stick. It was a long and thick white cock like a bottle with a long neck, only thin on the head, looking like a giant banana curved down instead of up. I never imagined that a boy-looking guy could have such a big cock, even more so if he wasn't negation. She commented: "Katia didn't lie... or exaggerate. He is really large. How much does it measure?" I could see him coming in almost all the way, only four centimeters were left out. Carla started moaning and rolling exaggeratedly. The bed was beating against the wall with a lot of force. She now made whatever noise she wanted to make. Kadu didn't say anything, let her run the show, just leave his dick hard, nothing more. After about 10 minutes on that frenetic horseback ride, he shouted for joy. I saw an impressive amount of fluid gush from its mouthpiece. I don't think I had ever seen so much. Her body trembled over this stick. I thought it would rest but it was wrong. She got off Kadu, grabbed his dick and noticed that there was some leftover sperm coming out of the canal.
"Well, it was so good that I didn't even feel. You see, little horn? He mocked and the stick did not become soft. That is a man".
He lay cross-legged on the bed and pulled him by his arm, wrapping his waist with his legs. His back was to me, leaning one knee over my bed and the other foot against the floor. I had a good view of that cock eating up my ex-wife because the contraction from that white pause entering Karla's mulatto cheekpiece was very sharp. She was highly lubricated enough to facilitate entry into that banana<unk> which was too thick in the middle but lacked depth to swallow all that thorax. Even so, she pulled him with her legs in a futile attempt to endure one more centimeter. The groans were outrageous as before and said unrelated words: "What a big dick!... Fuck... It tears me up! What a man...! My God!... Everything! All of it! Kills me!... Fucks off!" It seemed that she really wanted to die on the stick. Any woman would be limiting penetration but Carla was not; penis is too large for her.
That screaming went on for another 20 minutes or so, when the whore's amusement came between shouts and moans. Her body became soft and tossed onto the bed, but the boy didn't stop fucking. He rocked his emaciated little body over to me this time lying sideways facing me with shrunken legs; he stood up with one of his knees on top of it and penetrated again. She only groaned quietly in rhythm with the young man's vigorous strokes. The bed meanwhile creaked louder than any noise coming from the next room. Gradually she regained her strength. He started to masturbate while she penetrated him, at the same time he looked at me with an air of madness that I had never seen before. It was as if he were saying to me: "You see, your horn is what I like and it's what you deserve". She didn't say a word but I understood her message. Suddenly Kadu accelerated his movements and said he would mock. His whole body trembled and penetrate without pity until the last possible centimeter. Carla endured without complaining, just making an expression of pain. Then she stood up and poured the mockery on me. I think the intention was to pour it over my mouth, but it landed on my chest first. She rubbed her lipstick in my face without any delicacy whatsoever. The intent was really to humiliate me. Pure sadism. Little did she know that at this moment my greatest torture had been the pain in my testicles which could no longer withstand a hard-on and where I couldn't even punch myself. At this point silence reigned in the house. Both rooms were already silent.
Carla put her hand on my dick and noticed that in addition to hard, it was quite lubricated. Then she spoke softly into my ear: "You love this, don't you?" I did not answer. She knelt down on the floor, leaned over me and began sucking my cock. In a minute I was ready to make fun of him but he interrupted. He wanted to torture me. He waited for some time and then started again. I closed my eyes and concentrated on not making fun so fast in order to enjoy a little more of that delicious mouthful. Suddenly she stopped again. I opened my eyes and saw her looking back with a cocky smile, while Kadu pointed the pike to eat it in that position. He grabbed tightly at its waist and penetrated deep into it without mercy. She closed her eyes of pain, groaned but did not complain. Accepted this cacete pushing his uterus no limits. Once again I was just a spectator of that fuck. Sometimes she licked my dick like an ice cream but didn't suck. It was only for mistreatment. My testicles hurt even more. Her expression also had pain. That cock was supposed to be breaking her, but Carla wouldn't admit it; she would never complain about a big dick. She only complained of the knee on the floor and climbed into bed, standing 4 feet above me. The boy looked like a fucking machine, he gave strong blows that almost broke the bed. I didn't know if I felt anger or envy or jealousy or horny anymore; I think it all came together.
After a few minutes (about 15 or 20), Carla's exaggerated screams and the expression of pain on her face made me believe that she would interrupt this trance. She really did, but it was not to give up. Still positioned at 4, with her face leaning against my chest, she took her hand towards Kadu's cockpit, pulling him out from his mouthpiece. And in a hoarse voice, she asked: "Go, Gustoso, eat my ass". At the time I didn't believe. He even doubted a little, but she insisted. He placed himself and penetrated carefully, right down to the heel. Meanwhile, she whimpered lowly. When it was all in, she looked at me visibly tired and whispered: "What a huge cock". He started the waving slowly but listening to Carla's orders he began pushing harder without pity as she demanded. It was minutes of purely wild sex until finally he had fun for the third time.
Without saying anything, he left. She kissed me tenderly; she said that she still loved me; and untied my handcuffs. I didn't say a word. Then she walked out of the room. I heard shower sounds and some laughter, then more moaning and this typical trance noise underneath the shower. Taking advantage of my freedom, I touched a punch to relieve pain in her testicles, then fell asleep. It was early morning when Carla went back to sleep.
The next day we made the trip back to Rio. Before, at breakfast, Katia commented on the noises of last night thinking it was me and Carla having sex. She praised my breathing, saying that she and her boyfriend tried to compete with us but gave up after midnight.