Losing my Virginity with a Dog

I was 15 years old. Our family dog, a large German Shepherd named Ringo came in my room one evening while I was laying on the floor doing my homework. Ringo walked right up to me and stood horizontally in front of me as I started petting his soft but thick fur. I was laying on my stomach, my legs curled up over my body and my hand gently caressing his upper thigh and lower back region. I happened to look up from my books and paper and saw his massive, red cock protruding from his sack, it was dangling right in front of my face, just a few inches away.
I was 15 and a virgin, I had never seen a cock in person, only on the internet and certain science books. Now I had our family dogs, fully erect cock just a few inches from my face. I didn't know what to do, I had never noticed Ringo doing this before. Maybe he could smell that I was in season and my pussy was ovulating. Whatever the case I decided to reach out and grab it, just to see what it felt like to hold a cock in my hand. I grabbed it and slowly started jerking it. I felt so awkward doing it, he was our family dog, and I was a virgin. This was wrong... but that kind of turned me on even more. My parents were super protective of me and didn't allow me to date boys until I was in college. This was the only chance I might get to experience a cock before college.
I noticed Ringo was liking it, he started panting heavier and wasn't moving, so was obviously enjoying this hand job that I was giving him. I finally committed, I wanted to suck his cock and feel what it was like to have a cock in my mouth, so I put in just the tip of his cock in my mouth. It felt odd at first, and I wasn't quite sure how to feel, but after a few moments I realized that I wanted to go all the way. I was super horny, and was getting more turned on by the second as this taboo experience made me feel naughty and horny at the same time. I shoved his cock down my throat and started sucking him off, my head bobbing back and forth as his hard cock slid in and out of my tight little virgin mouth. This went on for maybe 5 minutes until suddenly I felt a blast of liquids shoot down my throat... he was cumming! Our own family dog was cumming in my mouth, and instead of pulling it out, I just continued sucking and bobbing and decided to let him finish. He shot his whole load in my mouth and down my throat as I was forced to swallow every drop of it since his large cock was stretching my tight little throat out. I didn't really get a chance to taste it since I was deepthroating him and his cum was shooting past my tongue and down my throat. I could just feel his wad hitting the back of my throat and sliding down into my stomach, I didn't know if it was safe to swallow dog cum but I was too horny to stop. I wanted to know what tasted like, so when he was done I pulled it out and licked off the leftovers from the tip. It tasted salty and sticky, but good.
I was still in the mood, and had now become extremely turned on by my family dog and wanted him inside me.
I took off my clothes, and got down on all fours, elbows and head on the ground and my perfectly round ass up in the air for him. I called him over and without hesitation he mounted me. It was if he had been dying to mount me and fuck me. He was still fully erect and slid his cock in my virgin pussy. He was very large and well hung, I felt him rip through the walls of my vagina and back into the breeding part. I had no idea dogs fucked so fast and hard like he did. He was making me his bitch, as I just laid there and took it like a good little girl. It was awfully painful, and I never thought I would be losing my virginity to a dog but here I was getting mounted and dominated by this massive boy as he was having his way with me and pounding my tight little pussy hard and deep. His balls smashing against my pussy with every thrust, he was all the way inside me, balls deep. Tears starting streaming down my face, it was so painful but I was covering my mouth trying not to wake my parents. I also wanted to be a good bitch for him and make him enjoy it, as painful as it was, his dominance over me was making me so wet and knowing how bad he wanted me, turned me on. He probably lasted another 5 minutes is my guess, but it felt like 50 from how painful it was. Sure enjoy he bulged up and knotted inside me, stretching my pussy beyond believe. The pain was unbearable! He starting shooting his massive load deep inside my pussy. I was getting pumped with cum for the first time and it was from a dog. I was his bitch. His cum dump. I laid there and took it. All of it. Trying everything I possibly could to not make any noise. He finally finished, what felt like a gallon of cum shooting inside my petite little body. The problem was, he was stuck. His knot was so big, and my pussy so tight, he couldn't pull out. We stayed there for another 15 minutes with him all the way up my pussy, fully knotted and stretching my pussy. He was daddy now, and I didn't want to force him out or upset him, so I just stayed in the same position, elbows and hands down, face to the floor and ass in the air. I was getting so scared and didn't know what to do. I could feel him drooling on my head and his cock still pulsing inside me. Finally he heard a noise outside in the backyard and found the strength to rip his knot out of me and quickly ran out of my room, down the stairs and out the doggydoor to the backyard. He was done with me, he made me his bitch, ran a load on me and took off. He left me lying there, his cum dripping out of my gapping pussy. I was so soar but so relieved to have it be over. I got up and took a shower, finished my homework and went to bed. For the next few years of my life, until I graduated, Ringo and I had many more experiences like this together.
All the events of this story are true and accurate. If you want more of my adventures with Ringo, let me know. I have plenty of these stories to share.