| Since my girlfriend had sex with our St. Bernard a few weeks ago for the first time, we have sex with all three of our male dogs at least twice a week. I have had sex with them many times without her knowing for about a year. It was just a couple weeks since she experienced what it was like to be mounted for the first time. I have been thinking about how to make it more interesting with her. I was home from work early one day and my girl was out with her sister and wouldnt be home for a few hours so I decided to play with our dogs. For the people that hasnt read my first story, we have a St. Bernard, lab, and a Akita mix, all males. I was on the floor wrestling around with them for about 10 minutes when I noticed our lab trying to mount our akita. With them all being males, they sometimes mount each other because we have no female dogs. I had our St. Bernard down on his back scratching is stomach when our lab tried to get behind me and mount me. I still had my shorts on so he wasnt able to get me but tried very hard. after a few minutes I noticed how all their dicks were protruding from their sheaths. I know I couldnt take on all three of them by myself but I knew my girlfriend would be home shortly and I decided to plan out her evening. I continued to tease them for awhile and get them eager for my girlfriend to get home. They continued to try mounting each other but I would stop them. I wanted them nice and horny for when she got home. Around 8:30 she got home and walked in with her sister. They had some wine with them and I knew my plan would have to wait. As we sat in our sunroom drinking wine the dogs were moving around kinda excited like they knew they were going to get their bitch. Our lab went over to her sister and started sniffing her feet and looking at her with these," come let me fuck you eyes. I noticed his dick starting to protrude. She must not have noticed his dick sticking out because she just pushed him away and kept talking and drinking her wine. I had to go to the kitchen and get another bottle of wine when my girlfriend followed me. For some reason she was acting kinda funny and asked her what was wrong. She told me she was fine, that it was probably the wine. Her and her sister had been drinking before they got home. She asked me to get out the tequila because her sister loced to do shots. As I got it out with a shot glass my girlfriend told me that she needed fucked good tonite and that after her sister leaves I could do her any way I wanted. As I started to walk back to the sunroom, I seen her sister sitting in the sunroom petting our lab while looking at his dick sticking out. She had a strange look on her face like she had never seen a dog dick.I noticed her letting him lay his head on her lap and he would bend his head and sniff at her crotch. She had on a short skirt and the lab would try to get his nose up her skirt but she would stop him and hold his head on her lap. I walked into the sunroom and handed her the tequila and shot glass and told her I had to go to the garage. My girlfriend had to take a quick shower so I told her she would be out in a little bit. She looked at me and said she would do a couple shots till we were done with what we had to do. Actually, I didnt have to go to the garage. I went to our spare bedroom and decided to watch her getting drunk from the shots. After the second shot, she leaned back on the couch and noticed our lab go up to her and tried to get his nose up her skirt. She twitched quickly and sat back up and pushed his head away from her. She looked around to see if anybody seen her. She done another shot and continued petting the dog. When she noticed the shower still running, I seen her open her legs a little and give her pussy a little rub. Still petting our dog, she looked around and let the dog stick his head up her skirt. She let him lick her a few times and could tell by the look in her eyes, she liked it. About that time the shower water turned off and she composed herself before my girlfriend came into the room. I waited a little while and joined them. After a few more shots I noticed they were getting a pretty good buzz going. I went into the kitchen to get some ice and called my girlfriend in telling her I needed some help. I told her what I'd seen her sister do and she looked at me and said"really" with a kinda devilish look on her face. We went back to the sunroom and had a couple more shots. I noticed my girlfriend starting to pet our lab kinda frisky. The other 2 dogs were up and moving around now. I knew what my girlfriend was doing. She was getting the dogs excited to see how far her sister would go. I knew if anything was going to happen, her sister wasnt going to do anything with me there, so I told them I had to use the restroom.I went to the spare bedroom and decided to see what my girlfriend was up to. As I watched, my girlfriend told her sister to look at the size of our labs dick at how big it was. Have you ever seen a dick that big?, she asked her sister. They laughed and her sister said it was bigger than any guys she had been with. As they continued to talk and laugh our Akita stuck his nose in my girlfriends crotch. That is when my girlfriend told her sister that she has let him lick her before and how good it felt. Her sister just sat there and watched as our Akita continued to sniff my girls crotch. My girl asked her sister if she wanted to feel how good it felt. She acted a little frigid about letting a dog between her legs but after another shot of tequila, she told my girl that the lab was sniffing her crotch while she was in the shower. My girl got our lab and walked him over to her and told her to lift her skirt. She didnt have to because our lab stuck his nose right up her skirt and started sniffing and licking. Her sister layed back and let the lab lick her any way he wanted. You could tell both of them were pretty intoxicated because thet were laughing between their moans. My girlfriend was sitting back down and had our Akitas nose between her legs and he was going to town on her. Here I was, watching my girl and her sister getting ate out by dogs and my dick was hard as hell. I was afraid to walk in and interrupt them thinking her sister might get cold feet and stop, so I just sat and watched them. As the dogs continued to lick away, our St. Bernard walked in the room with me and sat there while I watched the girls. I reached down and was petting his head and noticed his dick sticking out. I crouched down and rubbed his underside while he got up and went behind me and started sniffing my ass. The girls were moaning a little louder now with those dog tongues buried in their pussies. My St. Bernard was trying to mount me from behind and I was trying to keep him off because I didnt want to make any noise. He was determined to get on me and with him being so big, there wasnt much stopping him. I was getting real horny by now, watching the girls and knowing my St. Bernard ready to fuck. I tried to get up and take him to the girls when he grabbed me hard from behind and tried to shove his dick in my ass. I knew now there was no stopping him. I managed to get my shorts pulled down and after a few jabs in my balls, he found his mark. He shoved his huge dick in my ass and arched his back to get it all in. His dick is a good 9 inches to his knot and I could feel his knot swelling as it slid in and out of my ass. He was fucking me so hard that I had scooted out the bedroom door into the hallway. I couldnt stop from moaning as he slammed my ass and the girls heard me and got up and walked to the hallway. Her sister looked at me and said," OH MY GOD!!! HE IS LETTING HIM FUCK HIS ASS!!!" My girl told her sister that once he is horny, there is no stopping him. They got on their hands and knees and watched me getting the shit fucked out of me when he decided it was time to try to impregnate me. With a couple hard thrusts he slammed the knot in me and started pumping hard with short thrusts keeping his knot buried in me. I could feel the knot swelling fast and feeling like I had an orange in my ass and thinking I would be split apart but he kept jabbing me deeper to the point where I was pushing back getting his knot deep in me. The girls didnt realize it but the other 2 dogs had come in an started licking their pussies again. Our lab had got behind her sister and tried to mount her. She tried to stand up but the dog managed to push her down and tried to slam his dick in her. She tried to get him off her and asked my girl to help get him off, but my girlfriend was now being bred by our Akita. He was slamming her hard trying to climb all the way on her back. I knew he was burying his knot in her and was in no position to help her sister out. The lab had her sister down on all fours now and moved in on her ass. She tried to get away but his dick hit the spot and he shoved his dick in her pussy all the way to her cervix. She was screaming to make him stop but I was in no position to help her either. I had this knot buried in my ass and he was now starting to his cum deep in me. Here was the 3 of us on our hands and knees, nose to nose with dog dicks buried in us. I saw our lab arch his back and bury his knot deep in her sisters pussy. She stayed still with this confused look on her face when all the sudden he started pumping his cum in her. She was now being bred for the first time and you could tell she loved it. She screamed when she felt his cum shooting deep in her. We watched as cum started flowing out of her in cup fulls. Now my ass was being filled with cum also while my girl was yelling that her dog was pumping her full. Cum was leaking out of both there pussies and they were moaning as they were cumming too. Cum was leaking everywhere . My dog had filled my ass with what felt like a gallon of cum and tried to pull out but my ass clamped down on his dick and held him in there till his knot started shrinking. After about 15 minutes he yanked it out of me and cum started flowing from my ass. My girls dog yanked his dick our of her pussy before his knot went down and she let out a squeal and cum flew everywhere. We held the labs dick in her sisters pussy so she would know what it was like to be tied with a dog. I told here she was his bitch now and that he was impregnating her with his seed. We held him there for a half hour til his knot shrunk and plopped out her pussy. She looked under her to see the cum flowing out of her and couldnt believe her pussy could take that much cock and cum. We all laided there exhausted from the fucking we all got. Her sister stayed the night and took our St. Bernards cock and knot before we went to bed. We had to carry her sister to bed because of the size of the knot of our St. Bernard, he made her pussy so sore and stretched she couldnt even walk. The next morning we got up and decided that we would do it again that nite. Her sister spent the nite again. Thats a different story though!!!