Taken by her dog
I was wearing my older step-sisters thong panties, and nightgown. I had bent down to get a hidden magazine for visuals to jack off to when her dog mounted me and grabbed me tightly and wouldn't let go. On all fours wearing her pretty things, I didn't try to cry for help, because I was a guy and not supposed to be wearing her clothes, but I loved wearing her clothes and did every chance I got.
He started humping air. I reached back with one hand to try and stroked him to try to get him off quickly, so he'd get off my back, and leave me alone, but he went crazy and shifted position and soon found his way to my butthole.
I felt the hard tip of his cock enter me. As soon as he felt my warmth, he forced it inside me and started fucking me hard. He wasn't gentle at all, but I found when I relaxed, it didn't hurt as much. I pulled a pillow off my bed to rest on. I wanted to get it over with quickly, so I wouldn't be found wearing her clothes. I relaxed fully and let him fuck me. I had only seen him hump things for a few minutes, then he'd stop and lose interest, so I waited. Because of me relaxing or him changing positon slightly, it felt like he was fucking me deeper now.
I felt stuffed. I didn't know about male dogs, so when he finally stopped, loosened his grip, and rested on my back, I thought it was finally over. This had been very strange. I hadn't planned for it to happen, but a dog had just had anal sex with me.
I tried to move away, but felt something inside me that wouldn't come out holding us together. I was starting to panic, but he just slowly stepped off my back and turned away from me and something inside me turned when he did.
His cock was stuck inside me. He whined softly, and then pulsing feeling inside me along with warmth. He was cumming in me. Turned on, I started jacking off and quickly came. Several minutes later, he pulled out. It was finally over.
I felt different. I was filled with his semen and was leaking some as well. He licked my tender hole and then his big cock till is shrank back down and into its sheath then walked off like nothing had happened. For him it might have been just another fuck, but for me it was my first time having sex, and I realized that I liked getting fucked.
It was insane. I could have been caught at any moment dressed in her clothes or getting fucked by her dog. I quickly got out of her clothes and cleaned up. She was home less than an hour later, and was completely unaware what her dog had done to me. I sat across the room from her as she played with her dog. My ass was full of his cum, and the only thing keeping it from leaking out everywhere was one of her tampons I was wearing inside.
I read about dog mating and knotting. Having been his bitch, it became a huge turn on whenever I thought about what had happened. I wondered if she had trained him to fuck her or if he was just horny, and I was in the right spot for him. When jacking off, instead of the magazine, I would dress in her nightgown and panties and think of him on my back fucking me hard while I jacked off.
When we were alone again a few days later, I was horny and my hole had an itch. I needed to get fucked again. I wore the same nightgown and thong panties. I got a pillow and into the bitch position, and he mounted and soon was fucking me silly. I got a surprise this time, he was fucking me deeply again and we ended up getting knotted again, but this time was different, with me being turned on ready to fuck and all the stimulation he was giving me, I moaned and came hard. It was the most powerful orgasm I had ever had, and made me feel warm all over and wonderful. I was enjoying pure bliss while I waited for him to finish.
I was fucked by him a few more times after that and got that wonderful orgasm again and was almost caught being his willing bitch.
It finally ended when she moved out and took her dog. The sex that happened between us was very wrong, but I miss him. Maybe he will always have a special place in my heart, because he took my virginity.