sister in law wants canine sex

my sister in law came by and asked me to watch a video she had on her phone it was a sex flick with a dog i asked where did you get that she says a friend gave it to her to copy.
then she asked me if i still had my old friends number that trained dog for sex. i said yes we have been friends for years and yes she still trains and sells dogs to the right people. does she give trials and the like, i told her i think why do you want a sex dog she says i want to try it first to see if i like it the video really turned me on.

i said we can call her and see what she says about your idea. i called Sharon and told her about my sister in law Leslie. Sharon says bring her around tomorrow and we can talk about it. sis and i went over and Leslie told her about the video and showed it to her and asked about trying it with a trained dog.

first thing Sharon asked her is how deep is your vagina to pair you with the right sized dog Leslie says i don't know is it important, yes it is Sharon said. well we need to check your size first sis says how do you do that
with a round probe or a hard cock which do you prefer. i said let me measure for you sis she says how i said my cock is six and a half long with a hard on. she said so you want to put your cock in my pussy and then fuck me i suppose , i said i was only trying to help with a big smile.

Leslie says you have always wanted to fuck me haven't you i said yes i have then she says well i guess you can since i want to dog fucked or at least try it once, Sharon said well take off your shorts and get to checking her pussy before i get a probe to use. with the thought of fucking Leslie i was ready for her pussy.

i got naked and Leslie took off her pants only and says just push it in me and see how deep i am and no fucking me. i said you are not any fun just a quickie for fun. she just glared at me.

Sharon says use some KY so we can try her out i lubed her pussy and me and pushed right in her and balls deep i just touched her bottom. and pulled right back out and said i want some of that tonight when we go home. Leslie says we will see.

next Sharon says i have only my dog here right now so we will need to be careful, Leslie says what do you mean well he is a big boy and he is some what longer than your vagina. so i will hold him back so he doesn't go to deep.

she brought out her dog and he is big a great Dane black and white and so happy to see everyone. tail wags and licks Leslie says he is really big and so tall. Sharon aske her do you want doggie style or from the front
face to face Leslie says i am not sure which is best Sharon says either is good for your first time we will see.

got Leslie on the breeding bench and the dog knew what that was for and he was excited. he was over her she was looking up at him and his cock was out some and she saw it and says that's not to long, Sharon says there is more than that. well he got in her and Sharon held him back and he fucked sis fast and long
shot that hot precum and then his sperm in her and then stopped, she got him down and Leslie says that was amazing how fast he is and his fluid is so hot going in me.

we took a break the girls talked dogs and all then Sharon asked her if she want to try it doggie style this time. sis says yes i want more its such a great feeling. Sharon got her ready all naked this time as he slipped on her top and she put boots on him this time. i saw some nice tits then and i asked sis if they feel as good as they look she said you can feel them later i am wanting some good dog sex.

the dog was ready and so was sis Sharon got him in his spot and he mounted her and was trying to get his cock tip in her and was missing it. well he made in finally and Sharon says ok he isn't quite ready yet
he will grow in a bit. well Leslie moved back closer to him and he went in her and then he started to fuck faster and Sharon says hang on he is going to deep already then his knot was out and Sharon pulled him backwards then he went forward and then Leslie screamed and says he is in me to far so was his knot and they were tied then he was pumping her full of cum . Sharon say do not move till he is done coming and try to not pull off of him it will hurt like hell.

this took a while as he was flexing his cock in her and still coming too after about twenty minutes i guess Leslie says he is getting smaller now i feel it he was now shrinking down his knot and it came out of her pussy then his cock and god it was long . Leslie says he was so deep in me it felt like he was in my stomach
Sharon says he is very long and thin with a point on the tip so he went in your cervix and and then some your might be sore for a day or two he has done that to me too. Leslie asked Sharon how long is he knot and all Sharon says ten inches when is fully erect. also it will take a few days for all his cum to leak out of you just so you know.

as we all sat back had a drink or two Leslie says how soon can the dog fuck again Sharon says they have a faster recovery than a man. Leslie said could he do me again if you will let me Sharon says if your up to get it that deep again you can go for it if you want too.
well she did this time no help or anything just her and the dog he mounted her right off and was all the way out with the knot it wasn't big at this time it will get bigger as he is going in and out of you till it wont come out as it swells up.

Leslie was grunting as he hammered her with all that cock and knot as he was coming in her she says its so hot pumping in me and a lot it feels like. Sharon says a dog is hotter tan a man and produces a lot more sperm and a lot more fluid as in precum. the dog was shrinking some sis says then the knot pulled out and then his cock and Leslie looked at it all this time and says he had that much in me and she was shocked i am sure. she order a dog from Sharon and we left on the way home she tells me she is sore in side like her belly not her vagina and she had not leaked anything as yet.

got her back to my place and she took a soak in the tub for a while and says she loved being fucked like that she says now do you still want to fuck me with all that dog cum in me still i said are you up to a normal fuck after all of this he fucked you three times and the last was a wonder to watch. next time we should video it just for us to watch.

the next morning she gave up her pussy to me for the first time ever and she was a good fuck to bad her husband didn't stay with her. about a month later she was back and Sharon had started a dog for her to try out and see how it went. so that night i asked her if we could have sex again before getting fucked by the new dog. so i ate her pussy and fucked her two times that night before seeing Sharon and trying the new dog he needs more training Sharon says. so he did fuck Leslie and she says he is a better fit in her.
time will tell on the dog and Leslie is now pregnant she tells me as i am the only human that's fucked her in two years.