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            K R I S T E N' S    C O L L E C T I O N
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Four Year Old Bull Mastiff
by Domino (no address provided)

***

I have to tell you about the best fuck of my life. A 4 
year old Bull Mastiff named Spark. (F/beast)

***

I first saw him across the street from my house, he 
lived in the apartment. I stared at his huge ball sack 
as he walked by. I started making a fuss over him and 
going over to pet him when he was brought out. I 
followed the schedule of his owner, making sure we'd 
meet at least 2-3 times a week. I saw that he worked 
pretty long hours and finally asked if he'd like me to 
at least let him out for him and he jumped at the 
chance.

I walked him a few times, with the owner, because he was 
so big, but, like most big dogs, he just ambled along 
and I tried not to stare at his shifting ball sack, 
bigger than any man's I'd seen. We joked about his size 
and walked by a vet's office, where we took him in and 
had him weighed, 154 pounds. I'm 98 pounds. My pussy 
twitched at the thought of him mounting me.

I also acted rather 'grossed out' about his huge sack, 
and his owner just laughed and said that he was a stud 
dog, otherwise, he'd have had him fixed. I joked right 
back that he should buy him some underwear when he was 
out getting walked, not wanting him to suspect my true 
motives.

He gave me a key to his place and the first day, I went 
over to get him wearing a long sun dress, nothing on 
underneath. I was actually panting when I led him up to 
my house. I'd made sure all the blinds were pulled and 
I'd checked his height many times and I'd purchased a 
leather bench ottoman. I'd also attached a leash to one 
of the door handles, so he'd be unable to back up, if I 
was lucky enough to have him fuck me. 

I looked at his huge ball sack, as I followed behind him 
and, at the thought that maybe I'd have that cum 
shooting into my pussy that day, I felt a drop of cum 
actually roll down my inner thigh at the idea.

We entered the house and when I went to remove his lead, 
his head turned, I saw his nose flare and his ears 
pricked up. Panting, I stepped out of the sun dress, and 
stood in front of him, naked, with the drop of cum 
rolling down the inside of my thigh. His nose flared 
again and suddenly, he just shoved his nose between my 
legs! I moaned and leaned back against the door, 
spreading my legs for him. He licked me with his huge 
tongue and I shuddered.

I'd done some research, and found out that most dogs 
love the taste of pussy but don't seem to figure out 
where it 'comes from' and will repeatedly lick AT your 
hole, looking for more, but that's about it. So when his 
tongue actually penetrated me, I gasped and came hard on 
his tongue, now pumping in and out of my pussy.

Moaning and panting, I fell forward, onto the stairs and 
bucked my hips wildly as he groaned and shoved his 
tongue inside me as far as it would go. It was like 
being fucked by a snake, it rolled around inside me and 
I came over and over again. His breathing became very 
ragged and I felt his head moving in a different way and 
glanced behind me at him and saw that he was pumping the 
air with his hips.

That was the first time I actually saw his cock and, 
just looking at it made me blow all over his thrusting 
tongue again, it was bright red and had a lot of veins, 
and there were long runners of his sticky pre-cum 
dripping down from the tip of it. It was kind of bobbing 
in mid-air and, as I watched, I saw it shoot a small 
amount of dog slime out.

He was more than ready for me, but he was still 
frantically eating me out, he must have really liked the 
taste. Panting like I'd just run a marathon, I stood up 
off the stairs, where I'd been bent over, doggie style 
while he tongue fucked me.

I watched him standing there, panting very loudly, his 
dog meat hanging out, already about 9 inches long and 
very wide. Moaning, I went into the darkened living room 
and he followed me, also gasping with excitement.

I laid down on the far end of the leather ottoman, 
making him come towards the wall and he drove his tongue 
right back inside my pussy. Moaning, I attached the 
leash hanging from the door knob to his collar and 
quickly shot under him on the narrow bench. It was 
perfect, narrow enough that he could straddle it and low 
enough that I was at the perfect height for him to enter 
me.

Unlike what I'd read about some other dogs, his cock 
found my cunt very quickly. After only a few pokes 
around, his cock penetrated me and he did something VERY 
hot..after the head of his cock entered me, he paused, 
just like a man would and I groaned, listening to his 
heavy breathing. 

I was just about to push myself down on his shaft, 
moaning at the 'tease' of his cock just inside my pussy, 
when he suddenly collapsed his upper body onto me very 
hard, pinning me in place, 'walked' up the bench and 
then shot his hips forward, ramming me.

He let out an incredibly loud moan of pleasure and I did 
something I'd only done a few times in life and came so 
hard, I actually ejaculated, spraying all over his legs 
and balls. I bucked under him, completely at his mercy 
now. I tried to move around and realized that I 
couldn't, mere seconds before he groaned loudly again 
and, to my surprise, started forcing his knot into me. 

Considering the amount of drool and the huge spray of 
cum I'd soaked him with, he was able to shove it into my 
dripping hole after a few thrusts.

God, it vibrated inside me as his cock grew, spurting 
loads of pre-cum into me, practically every time he shot 
inside me, I shuddered and came. I knew that dogs will 
cum the entire time they're fucking you, but had seen 
that it was usually only a small amount, once every 
minute or so, but Spark shot huge wads of hot dog cum at 
least every 30 seconds or so, I heard my pussy sloshing 
with all his sperm.

His knot was still expanding inside me, now absolutely 
huge, plugging me completely. He didn't use it strictly 
as a method of cumming, he used it to fuck me and I came 
over and over again, feeling his hot dog cum spurt into 
me every few moments. I was surprised, thinking that 
when the knot was in, they stood still and just filled 
the bitch with cum.

But, he began taking long, hard thrusts into me, 
actually stopping at times, I think he was doing what a 
man would, holding off so he didn't come too soon but, 
eventually he began grunting louder and louder, each 
thrust actually making my legs flail.

Then, he did it, he braced himself and groaned and I 
felt the contents of those balls that I'd been staring 
at so long emptying themselves inside me.

I squealed and flopped under him as he continued to 
thrust, his dog cock vibrating and jerking in me, going 
off like a fucking fire hose, the tops of my feet 
bouncing on the floor. He came for 8 minutes inside me, 
his knot still fully inflated. The temperature of his 
cum was incredibly hot, I could feel each and every 
spurt enter me.

I felt his cock starting to shorten inside me and he 
stood up, that's when I realized he'd actually 
'collapsed' his upper body on mine, making sure I 
couldn't get away from his pounding cock and stood 
there, not trying to pull away yet. 

Realizing that he couldn't pull away, dragging me off 
the ottoman on his knot because of the leash, and still 
incredibly turned on, I kept bucking beneath him, 
cumming on his meat while I still could.

As his knot deflated, even with his cock still inside, 
his cum could finally explode from me and I moaned and 
bucked, hearing it actually pattering down on the 
hardwood floor, so much that it sounded like one of us 
was taking a piss. I felt it flowing down the front of 
the ottoman, rolling off the leather to create a puddle.

I came a final time, and went to push off, finally 
satisfied, but, Spark had other plans, that's when I 
noticed his breathing had become ragged again. He shoved 
me down again, his cock stiffening inside me!

I felt him growling and froze, unable to believe he 
could have any sperm left in that sack of his after the 
huge load he'd shot. But, he was taking it slow this 
time and I laid beneath him, trying to get up a few 
times, loving the way his body would tense up and shove 
me back down, I realized that even though I was still 
enjoying it, my pleasure didn't mean a thing to him, 
this animal was going to take me until HE was satisfied.

He began hard thrusting again, grunting VERY loudly. If 
someone had been walking by and the windows had been 
opened, they would have been able to hear him all the 
way out to the street. As he rode me, his cock seemed to 
get even bigger, and I couldn't help but squeal as his 
knot re-entered me. When I cried out, I heard him grunt 
even louder and his cock twitched hard, forcing me into 
yet another orgasm.

Moaning, I felt him shoving up on the bench further and 
further, then grunted myself when he climbed on top of 
me from behind, his back legs now off the floor. His 
cock penetrated me even deeper and now completely 
pinned, I squealed under him again, this time, even 
louder.

He went into a fucking frenzy, his breath gasping, his 
cock slamming into me, his full 13 inches forced into 
me. His back legs were sticking out behind us, his 
weight balanced on his from paws. My body slid up and 
down on the bench, my entire front eventually being 
covered in dog cum, as he continued to pump on top of me 
for another 30 minutes, his cum sloshing inside me 
again, my cunt sealed shut by his knot.

The second time he began cumming wasn't as long as the 
first, but every bit as incredible. I felt his hot spunk 
exploding from his jerking cock, his moans and gasps of 
pleasure heard through his chest, my cum covered face 
turned to the side and body crushed beneath him. My legs 
flailed on either side of his huge body as he filled me 
up again.

I shuddered under him too, both of us covered in each 
other's cum and when he finally softened enough to pull 
out, his cum came out with such force, it actually 
splashed on the floor as I lay on my stomach on the 
bench, my legs over the side, his cum poured out.

He got off me, his cum still streaming out. I stood up 
shakily, looking down at my normally flat belly, now 
actually distended by his cum. Panting, he went and had 
a long drink, and I stared at his ball sack, dripping 
with cum.

As soon as I'd cleaned myself up, and re-dressed, he was 
back to being his previous amicable lump so I took him 
into the walk in shower and washed him off. Then, did 
what I'd promised originally, and took him for a good 
long walk.

The more I thought about having him inside me again, the 
kinkier my mind became. I decided to go into a pet store 
to see if there was anything there we could use, such as 
a collar for me that I could tie to his, loving the idea 
of being choked while he fucked me.  

Then, felt my cunt twitch when I looked at the shock 
collars. I told them that I had a large dog, who was 
quite aggressive towards other people. I was told that 
the shock wouldn't really hurt him per say but, if it 
was dialed up to the top setting, it could potentially 
drop the dog, so I wasn't supposed to set it that high.

I took it home that night, and after making sure that I 
had a tea towel between my neck and the collar itself, I 
hit the remote. My body shook for 30 seconds as I 
watched myself standing there, naked in the mirror. I 
took it up slowly and determined that at 3/4 power, it 
was enough to drop ME to the ground and jitter 
frantically for those 30 seconds.

I also turned on the anti-barking switch, in case I was 
to drop the remote while dancing on his dog meat and 
determined that it didn't take too much noise to have it 
shock me when that setting was high too.

The second time I went to pick him up, I was quite 
nervous, thinking that maybe he'd knock me down in 
either his apartment or, out on the street, but he acted 
completely normal until we entered my house again, 
seeming to realize that this wasn't something to be done 
anywhere else.

As soon I unlocked the door, I glanced behind me and saw 
that the head of his cock was already out of its sheath 
and gasped looking at it, my pussy was already dripping 
wet. I heard his hard breathing as I entered the living 
room.

I stripped out of my clothes and I heard his panting 
increase as I laid down on the ottoman, legs spread 
wide. Staring at me, he dove into my lap, frantically 
licking my throbbing pussy. I reached down and attached 
the collar around my neck and hit the remote just as his 
tongue shoved it's way into my hole.

My body shook hard, my arms and legs thrown wide open, 
muscles stiff as my hips jerked wildly. He grunted as he 
tongue fucked me, stiffening it as it swirled around 
inside me.

Relieved that the shock wouldn't go through to him, I 
came hard on his tongue. I looked down at him, his jaw 
gaping wide, his tongue twisting deep inside me as he 
stared right back at me, feeling his drool running down 
my ass crack.

I didn't have to go up the bench this time to get him to 
enter me, after around 5 minutes of eating me out, he 
moaned and came up on his own, straddling me.

On my back this time, and it was so fucking hot to be 
able to look up at him, his chest rubbing against my 
tits and he positioned himself over me, hips bucking 
before he'd even entered me. I reached down and started 
stroking his dog cock, amazed at how well I could feel 
it pulsing with each beat of his heart and how hot it 
was to the touch.

I had to stop jerking him off though, before that knot 
started to grow, or he'd never be able to get it into me 
so he could cum. Panting hard and fast, he thrust his 
tool inside me and, just like the last time, he groaned 
very loudly... so loud in fact, that it set the collar I 
was wearing off and I was electrocuted as he forced his 
dog meat into me. Again, my arms and legs were thrown 
out and I heard him gasping with pleasure as my pussy 
milked his huge cock with each pulse of the collar.

This continued again and again and I couldn't control my 
screech when he shoved his knot into me, the collar 
punishing me for my shriek by making me dance under him, 
hearing him moan so loud as I came repeatedly, the 
shocks making my pussy spray every time.

The collar made it some of the best sex I'd ever had, 
every time either one of us made too much noise, I'd be 
shocked, my pussy clamping shut on his cock and he 
filled me with his hot cum three times, his knot never 
getting small enough to get out of me, I felt him 
stiffen again and again, his hips thrusting wildly.

At one point, during a shock, he took his weight off me 
to watch me dance and I slid off the soaked ottoman onto 
the floor. Groaning, he fucked me as my twitching body 
hung from his cock, my head thrown back, hips jerking in 
a circle.

After that shock was over, I reached up to take the 
collar off, realizing this was going to get me really 
hurt if he kept standing while we were locked together, 
but he collapsed on top of me, back legs straight out on 
the floor and his elbows right above my shoulders. I 
looked up at his face as he fucked me on the floor, my 
body slipping around in his cum, his eyes were wild as 
he started fucking me very hard. I grunted helplessly, 
the collar making me buck under him as he blew his load 
inside me again.

I heard it splattering on the floor, my heels drumming 
behind him, his balls contracting and those huge balls 
jetting load after load of his hot doggy cum deep inside 
me.

END

--------------------------------------------------------
This story was written as an adult fantasy. The author
does not condone the described behavior in real life in 
any way, shape or form. Anyone tempted to act out any of 
the scenarios in this story should seriously consider 
seeking professional help.
--------------------------------------------------------
Kristen's collection - Directory 82