Jenny and I had been married for years, and most of  our relationship had been great.   We enjoyed most of the same things such as the kind of music we listen to, we both love hockey and football, the same kind of movies and yes, even sex.   We made love often, and it was usually great.   Nevertheless, I had always had this nagging feeling that she was not being completely satisfied by our lovemaking.

Still, I had to admit that she almost always seemed to reach orgasm, particularly when I took her clit in my lips and licked back and forth across it as fast as my tongue could go.  I could see her tummy muscles tighten in spasms as she groaned faster and faster until she cried out and then relaxed, becoming all soft and warm.  Her climaxes were similar when I pushed my cock in as far and as fast and as hard as I could, but those orgasms were not as intense (at least I wasn’t sure).   As a result of this concern, I began to wonder whether I might be falling some what “short” in fulfilling her sexual needs.

As time passed, I began to develop a fantasy as to how to test my theory that Jenny would be more satisfied by a bigger cock.   At first I thought about getting one of those giant dildoes I’d seen in the porno store, but decided that that would have been so obvious as to negate the value of the test results.   The only true test would be for Jenny to think that I was fucking her, but with a bigger cock.  However, at least so far, there were no hospitals providing dick enlargement operations, so that meant that if I was ever going to find out, I would have to find someone else (with a really big dick) to fuck Jenny while she thought it was me!

Where does one begin to recruit someone for this sort of a plan? I couldn’t go to a night club and “pick up” someone.  It had to be someone I could trust, someone safe, and someone “hung”.  There were plenty of guys at work that would love to get their dick in Jenny, but there’s the old saying about “don’t shit in you own backyard” that made co-workers out of the question.  So what to do?

It was about this time that an old friend from my high school days called to say he was back in town and would like to get together and renew our friendship.   I didn’t put the two situations  together at first, but when Mark and I  began reminiscing about out days together on the Track team, I remembered why I had envied him.  As I recalled, Mark’s cock was as big soft as mine had been hard, although we never made a direct comparison.  I thought that he was very probably (at least physically) what I needed to fulfill my fantasy “test.”

As Mark and I talked, I learned that he was recently separated from his wife, and that they were going to get a divorce.   He stated his displeasure at reentering the dating scene, saying that all the really great women had already found someone and gotten married or were at least living with someone.   He also confided that he had once had a desire to pursue Jenny, but that I had “beaten him out”.  This was almost too unlikely to believe, but what the hell, I decided to give it a try and see how far I could make this go.  Could I really let another man fuck my wife?

Over the next several weeks, we had Mark over for dinner and we went out to the movies together a few times.  Jenny fixed him up with some of her girlfriends from work, but nothing clicked.  All the while, I was making casual hints about Jenny and me to Mark, trying to see if he showed any interest, He seemed genuinely concerned about us, and I felt more comfortable all the time about revealing my fantasy to him.

One night, after dinner, as we were having a drink, and Jenny was on the phone with a friend, I decided to open the door on my soul a little wider.  I asked Mark to confirm that he still found Jenny attractive, which he did.  I then began to explain my concerns about our physical relationship.  He understood, and joked that “all you pencil-peters have that fear.”  “Thanks a lot”, I answered.   “You’re a big help.” “Well, what the fuck can I do about it?”, he asked.  “Look Mark, you and I have gotten pretty close, and I think I can tell you something in confidence without fear of your having a bad reaction.”

I proceeded to carefully outline my fantasy to see if Jenny would have a stronger orgasm if she were making love to me and I had a bigger dick.  “So how you gonna do that?”, Mark asked.  “Well”, I said, “You asked what you could do….” Then I went full ahead and detailed what I thought could work to fool Jenny into thinking that she was screwing me when in fact she’d be screwing Mark.  He was not too eager at first, but after some  long-winded rationalizing, I began to turn him toward agreeing to give it a try.   I asked him just how big he was, to which he replied “big enough!”.   Finally I got him to admit to 10 and a half inches.  “Sure!”, I said.  “Want proof?” he asked.  “I’m from Missouri.  Show me!”.  I got a ruler, he got   it hard, I checked, he’d lied…  it was actually just over 11″.  “HOLY SHIT”, I said.  “Ever size, maybe this wasn’t such a good idea after all.   But I’d committed to this course, and I was determined to get the answer to my question.

Obviously, it would be necessary for Mark to be present without Jenny knowing it, so the first order of business was to select a location where I could be fucking Jenny while Mark was close by.  We decided on the rec room, because of the storage room nearby where Mark could hide until I got things going.  There were these big floor pillows that Jenny and I had fucked on before, so that wouldn’t arouse her suspicion.  Next, we had to figure out how to get Mark into the storage room without Jenny knowing that he was even in the house.  We figured that we cold “sneak” Mark into the house while Jenny was at the store.  Then we had to come up with a way for Mark to relieve himself in case he had to take a piss while he waited in the store room.  An empty coffee can with its plastic lid would work OK.  Since there would be no easy way to signal Mark when to come out of the store room, we agreed that he would just have to peek around the doorway to the rec room and use his own best judgment as to when to come in.   The lights would have to be off so that Jenny would not be able to see Mark and I trade off.

Finally, the big night came, and as Jenny left in her car to go to the store, I called Mark  He parked around the corner so that Jenny wouldn’t see his car when she returned.  “Are you sure about this?” he asked as he came in.  “Yes! I’ve got to find out, or I’ll wonder for the rest of my life.” “OK”, he replied, “as long as you’re sure.” We checked out the storage room, and the path through the rec room, so that he wouldn’t trip on or walk into something as he approached in the dark.  Fortunately, there was a moon out that night, which would help light the rec room a little through the skylight.

We went over the plan while we waited.  I would give Jenny enough to drink to ger her a little tipsy and then start making love to her on the pillows.  I would get between her legs and caress her thighs and hips with both hands, one on each side.   I would continue this caressing as I put my cock into her.  At this time Mark should show up and get into position behind me and a little to my left.  As I would bring my left hand down her right leg, I would lift it away, and Mark would begin to caress her as I had done.   Then I would pull by cock out of Jenny’s pussy and run it along her thigh, back and forth, while fondling her clit with my right hand.  As I reached as far down her leg as I could, Mark and I would trade places, and he would move his cock down her leg and into her pussy.  His hand would take the place of my right hand as we finished the switch-over.  It sounded like it would work OK.  In any case, we would know pretty soon.

When Jenny returned, I helped her put away the groceries, and asked her if she’d care for a drink.  “Sure.”, she said, so I fixed her a Gin Tonic, her usual.  I fixed a Scotch and water for myself, very mild so I could stay alert and coordinated.  We went to the rec room, talked about work and about going on a vacation to Lake Tahoe next summer, and danced to some ’50s music on the radio.   When I refilled our drinks I made Jenny’s a little stronger than usual, but kept mine weak.  Jenny was enjoying the mood, and her body was warmer and her kisses more demanding all the time.  After still another drink, we danced to an old Elvis ballad (“Love Me Tender”) and she began rubbing the front of my jeans with her hand.  I kissed her deeply, and began undoing the buttons of her blouse.  “I love you, Jenny” I said as kissed he neck, then her breasts.  Her tits were so very firm, and small but not “little”, just perfect!.  Her nipples pointed upward slightly, and were hard and hot as I sucked on them.

Gradually we undressed one another and held each other close, kissing.   As we sank slowly to the floor, I turned out the last light, and slid one of those big pillows under Jenny.   I began caressing her arms, her breasts, her tummy, her thighs, her everything.   Jenny was only moderately active, probably from the booze, which was exactly what I’d hoped for.  As I kissed my way down the front of her, she moaned softly.  As my tongue parted the lips of her pussy, she only moved a little.  It was then that I pressed against the insides of her knees until she had spread her legs wide apart.  I hoped there would be enough room for the switch from me to Mark.  I continued to kiss her pussy and caress her legs until I felt Mark move in behind me.  I almost panicked at this point, for fear that Jenny would realize that I was up to something and that she’d get pissed off.  But she was still enjoying my attention and didn’t sense anything other than my tongue, and my hands.  Slowly, I raised my head up from between her thighs and moved myself into position.  I gently eased the tip of my dick into her and then pulled back, rubbing the tip around the outside.  All the while I was rubbing up and down her right leg with my left hand and fondling her pussy with my right.

When Mark put his hand on my left forearm, I almost jumped.   I wasn’t expecting it, but managed to maintain my concentration.  I raised my left hand off off Jenny’s leg, and Mark took over the caressing on that side.  I pushed my cock back into Jenny, a little further this time.  I moved myself as far to the right as I thought I could without arousing suspicion, then pulled out again.   As I moved the tip of my dick along Jenny’s right thigh, she moaned “Please put it in again”.  I raised up as far as I could on my knees, and Mark began to move in front of me.  In the dim moonlight, shining through the skylight, I could see his big cock sliding down her thigh.  “What the fuck am I doing?” I thought.  But before I could think about it I had to move out of the way.  That required pressing very tightly against Mark’s back. As my dick passed over the crack of his ass, I had a thought.

“No, this is not the time for that kind of new experience” I thought.  I moved all the way out then, and positioned myself so that I could watch the penetration.  Mark was soooooo big! I felt very strange as I watched the tip of his dick enter that beautiful “honey hole” that, up to now, had been my private playground.   In it went, past the tip, past the circumcision scar, down, deeper, deeper, all the while Jenny’s moans getting louder, deeper, different than I’d ever heard before.  “Ooooooh, that’s sooo good!”, she said in a low, very soft voice.  “Don’t ever stop!” Mark picked up the pace, faster and faster, deeper and deeper.   Jenny’s moans were almost gasps.   “Ooh, Oooh, Yesss, Yessss, YEEESSSSSS!!!”.  It was finally over.

It was then that I heard those words that I’ll never forget.   “Oh, Mark, you’re as good as ever! You always were the very best!”  To make a long story short, Mark and Jenny lived happily ever after, I jack off a lot.