Of course, we talked about it the next day.

“Jill, it was really wonderful to see you so blasted. Nitro’s tongue really does do the trick and, honestly, I so enjoyed what we did last night. So don’t worry about me not getting my turn.” Jill had been stressing a little, knowing that she had lost control so far, nobody else but her, got completely off. It wasn’t an issue with me, but I would have a problem if this turn of events became the norm rather than the exception.

“Thanks Rob, but I know you didn’t get any satisfaction. Nitro is just pleasing me, he isn’t getting anything out of it either. I feel so selfish, but I truly was completely done for. Perhaps it was because it was the first time, who knows.” She bit the corner of her lip, a sure indicator that she didn’t feel comfortable at all.

“Look, we can call it a day with Nitro if you want. I can see you are worried and it isn’t supposed to be something to worry about. Jill it’s meant to be a bit of fun, let’s not make a big thing out of it eh?”

“You must be kidding! I want more of Nitro and, if he is up for it, would love to finish him off in my mouth while you fuck me.”

“Fuck me Jill! Have you seen the size of a dog’s cock?” I doubted she had. “They ain’t like a man; their cocks have a bone in them and then a fucking great big ball called a knot. Get it wrong and all kinds of things can go tits up.” But, the picture was cast in my mind of Nitro’s cock, all purple and veined with Jill’s lips wrapped around it. And then, the picture changed again, in a natural progression, Jill was gripped in a tight embrace around her waist, while Nitro fucked into her.

“You know, I had a thought, why not try to get Nitro to fuck you; probably safer than you trying to swallow his cock.” The idea gelled in my mind’s eye. “Oh Jill, wouldn’t it be great?” I didn’t want to pressure her, but once the idea had propagated, it was hard to stop it. “But, only if you’re up for it, of course.”

She must have replayed the conversation back.

“You seem to know a lot about the anatomy of a dog. Where did you get to know about a dog having a bone in its dick?” She looked at me from the corner of her eye as if to seem uninterested, but I knew she was hanging on my reaction and answer to her question.

“Just type K9 into a search engine, you would be amazed at the amount of crap that comes up, but a few sites carry a ‘how to’ section, very informative.” She visibly relaxes; her suspicion that her husband had some secret life was allayed. “It really is more common than you might think; millions of people are into sex with animals in a big way.”

“Well anyway, we’ll see how things go eh?” Jill was noncommittal, just as I expected her to be. I knew she would think about it for a day or two, but again, the seed was planted, watching it germinate was going to be an exquisite, but expectant wait.

Over the next few days and by not making it obvious, I watched Jill sizing up Nitro. I saw her glances that stared at his sheathed cock, estimating the size to which it might grow. Looking through the history of visited sites on the computer told me she had been doing her own research. I was a little amused at her reaction when he sat in front of her while she was watching the television. The tip of his cock, very pink and sharply pointed was poking out of its sheath, it mesmerised Jill, then, she licked her lips and I knew for certain, she almost tasted him. Her imagination was trying out the scenario; her reaction told me that the scene was quite pleasant. I’m no amateur Psychologist, but some reactions are all too obvious to be missed. The seed was growing and the time before it all happened was getting shorter.

Friday night in fact; D day, as it were.

Jill and I had shared a bottle of Australian Shiraz and, with a pleasant buzz, decided to go to bed. She ran the shower and stepped in, soaping her self, raising mounds of white frothy bubbles and humming softly to her self. Picking up on the signs, I quickly followed her in, washed her back and held her as a prelude to sex.

We dried and went to bed naked, warm and relaxed. We lay on top of the quilt and cuddled, running finger tips over each others backs, causing goose bumps to raise that had nothing at all to do with a chill. We got over the frantic lead up to copulation years ago, preferring to bring each other to a readiness slowly, savouring each other in a sensuous crescendo that involved tongue, finger, lips and caresses that gradually brought climax. Screwing was the end result of a longer event that almost always resulted in a mutual orgasm.

Our fore play was well under way, Jill’s breathing had become a little ragged when my fingers had found and teased her clit while I sucked on her nipple or kissed her neck.

Suddenly, Jill got up from our embrace and opened the bedroom door, leaving it wide. I could read her mind. If Nitro wanted to come in and join us, he would be welcome, but she wouldn’t invite him in with a command. It was up to the dog.

She came back to join me and a few seconds later, the click of his paws could be heard coming across the laminated flooring that led to our room.

Although we were very aware of the dog sitting at the side of the bed, we carried on with our embrace as if ignoring him.

I guess he was feeling left out, because pretty soon, Nitro jumped up on the bed, a place he had never been before. His cold nose quested at Jill’s box, pushing my fingers aside so that his tongue could lap at her cunt and clit.

She gasped and flung her legs wide, allowing him easy access. His broad tongue went to work, lapping at her, exciting her labia into suffusion and heat. Her wetness evident on his nose as it appeared above her mound.

I thought I would let it go on for a short while. I didn’t want Jill to come so hard that she would be useless for anything else. She shuddered in my arms, a sigh escaped her lips and then, perhaps knowing that the last time had been so devastating, she closed her legs so that he couldn’t get to her sex. He tried though, and kept on licking at her neatly trimmed bush.

Jill patted the bed, inviting him to come up the bed. I watched, waiting to see what she had in mind. Nitro got the hint and started to lick at her nipple and then, he licked her cheek, then her mouth. Jill’s lips parted and she got his tongue between her teeth in a French kiss. What I was seeing was so hot. Right in front of me, this dog was frenching my wife and she was obviously having a ball.

I thought I would take care of business at the other end and scooted down so I could get to work on her clit. From my new vantage, I had this sudden view of Jill’s hand wrapped around Nitro’s cock. She had pulled back his sheath and was stroking his darkly veined cock in a gentle grip. Nitro seemed to be quite comfortable with what she was doing because he stood quite still, allowing her hand to perform its magic.

With a raging hard on, I thought I would do the same for her. I began to finger fuck her slowly while my eyes were riveted to what she was doing to Nitro’s growing cock.

Jill was soaked. Her juices were flowing freely, slicking her lips and my fingers as they slid into her gash and teased her already engorged clit. She was moaning in that guttural way she has when words or anything else, are beyond her.

Nitro was still reaming her tonsils, lapping at her mouth while his cock had grown to a length that surpassed mine by a few inches. His haunches were beginning to hump, his back arching so that his genitalia was pushed forward. Each flick of my finger tip over Jill’s clit was making her shudder. She was coming in a constant production of her natural lubricant, her aroma invading my sinuses, telling me, at a subliminal level, that she was more than ready to mate.

Suddenly, she scooted down, disregarding the ministrations of my fingers and Nitro’s tongue. She turned on her side, pulling the dog down until his sharp cock was nudging her lips.

“Rob, you had better fuck me now or I swear to god, I will kill you.” She opened her mouth and stuffed as much of Nitro’s dick between her teeth as she could manage while she grasped the remaining length in her fist.

I didn’t need any encouragement. Slipping down over the sheets and with my feet hanging off the end of the bed, I pushed my cock between her ass cheeks and, with the help of my fingers reaching around her thigh, managed to shove my cock into her willing and wanting cunt. She was so wet; there was no resistance at all. All of my cock slid into her and I fucked her as hard as I could. By supporting my head on a crooked arm, I could watch her sucking Nitro. His cock had reached a proportion that I couldn’t imagine a dog of his medium size would hide. It must have been all of nine inches and God knows what in circumference. Then, right at the base of this massive weapon was an expanded ball, covered in purple veins that looked about the size of a tennis ball.

Without forethought, and knowing what it is that triggers a dog’s ejaculation, I reached over and formed an ‘O’ behind his knot and squeezed in gentle pulses. It was the necessary signal his instinctive brain was waiting for. It had been tricked into thinking he was tied. His humps became sporadic and less pronounced as a steady stream of hot come shot from him and into Jill’s mouth. There was far more than she could handle, it hit the back of her throat and was pushed out by her tongue that was working hard to eject as much as possible, but I could see her throat muscles swallowing what didn’t pulse out between her lips.

I defy any man to hold on in a situation like that. Although I had stopped fucking into Jill a little while back, my cock had stayed deep inside her. It twitched and suddenly, my own load was emptying into Jill. The ejaculation was almost painful in the need to fill her womb.

That was it for the night. The hottest session we had enjoyed together and the most fulfilling and satisfying. Nitro licked Jill’s cheeks clean of his come before jumping down off the bed to clean him self.

I admit to doing absolutely nothing apart from throwing an arm over Jill and dropping off into a sleep that resembled the dead.