Helen and I have been married for two years now, but my fascination with the idea of watching her fuck another man began when we were still dating.

One night after several drinks she began talking about her experience dating Mark, a guy I’d met.

She said they often made out in his car, and she gave him blowjobs while allowing him to play with her tits and finger her pussy, but she wouldn’t let him fuck her because she wanted to be a virgin when she married. She would often lie on top of him and dry-hump his large cock until she came. She said she broke up with him because she learned he was cheating on her.

I kept on picturing Helen lying on Mark and humping his cock, and each time, my cock got so stiff that I had to jerk off. I fixated on seeing my wife’s tight little body (she’s a shapely five feet four, 110 pounds, with D-cup breasts) riding up and down on a well-hung guy’s cock.

A month ago Helen and I were out for the night, and who should we bump into at a nightclub but Mark! He joined us at our table, and we all had several drinks as we caught up on our lives. He told us he was engaged and living with his fiancée.

After a while Mark asked if he could dance with Helen. When she looked at me, I said it was okay with me if she wanted to. She took his hand and they went out on the dance floor, dancing several dances. When a slow number started, I saw that as they danced, she had his right thigh between her legs, and since she’s a lot shorter than him, I thought she was rubbing her pussy against his thigh. When they returned to the table, her face was flushed and her nipples were poking out of her sweater.

We left shortly after that, and when we got home Helen was a tiger in bed. She gave me a dynamite blowjob, then straddled me and rode my cock cowgirl-style until she had a powerful orgasm.

After I came we spooned. While I was stroking Helen’s breasts, I took a chance and asked why she was so turned on. At first she said nothing. When I suggested that maybe Mark had gotten her all worked up, her body tensed and she became nervous. I assured her it was okay and we could talk about it. She turned around facing me and, choking back tears, admitted that when they were dancing, she had subconsciously started to rub her mound on his thigh, and that brought back memories of dry-humping his cock. She said she became very aroused while humping his thigh, and he made a point of pressing his thigh against her pussy.

Helen apologized in tears, but I told her I had suspected she was humping Mark’s leg while they were dancing and I got really turned on thinking about it.

She said, “You got turned on seeing your wife doing that with another man?”

“Yes,” I said, “and my cock is hard again now just talking about you doing it.”

Helen’s eyes got real big. I felt her hand wrap around my rod. While she began to stroke it slowly, she let out a low moan. Then she pushed me on my back and straddled me. She laid flat on me with her legs together and pressed her breasts into my chest while kissing me passionately. Soon I felt her wet pussy sliding back and forth on top of my cock so the tip was rubbing her clit. I took a chance and said, “Hump me like you used to hump Mark’s cock, honey.” Which brought a moan from her.

After a minute of Helen humping my cockhead and moaning, I whispered, “Pretend it’s Mark’s cock and fuck it!” Helen let out a loud growl as her body moved forward and she parted her legs. When she moved back down my body, my cock slid right in her wet pussy. She let out a deep moan.

Helen rode me like a woman possessed. Each time I told her again it was Mark’s cock inside her, she moaned. I felt she was about ready to explode when she pressed her mound hard against my pelvic bone so it was massaging her clit. She wailed as she came, and her body shook for quite a while before she resumed fucking my cock. I held out as long as possible but eventually came in a torrent.

When Helen was spent, she collapsed on top of me and we kissed while saying how much we loved each other. We fell asleep in each other’s arms, but during the night I was awakened by Helen’s masturbating. She was lying facedown on the bed with her hands by her pussy. I crawled next to her, and as I put my hand on her ass, I whispered in her ear, “Fuck Mark’s cock.” She let out a wail, increased her tempo and came within a minute. Then we kissed.

The next morning being a Saturday, Helen and I were cuddling in bed when I introduced the subject of wanting to watch Mark make love to her. Her eyes grew wide and her breathing became rapid. When I proposed inviting him over, she saw how hard my cock was and said, “I see that that really turns you on, doesn’t it?”

“Yes,” I replied honestly, “and I think it turns you on too.” Her eyes turned away, and she nodded sheepishly. I said, “Then I’ll call him and invite him.”

Later, I got Mark’s phone number and called him with my phone on speaker mode so Helen could hear everything. I didn’t say what we had in mind, but I suspected he had an idea since I had asked him to come without his fiancée. He indicated that Monday night would work, so I told him to come over at half past six.

When I hung up, Helen came into my arms and asked, “Are you sure you want me to do this?”

I replied, “I want both of us to do this. The thought of you on another man’s body turns me on. My cock was hard all the while Mark was on the phone.” She felt my hard cock and smiled.

For the rest of the weekend Helen was one wild sex machine. She wanted my cock every chance we had, and she fucked me like she did when we were on our honeymoon. The woman seemed positively insatiable. I knew that Monday could not come soon enough for either of us.

I knew that when Helen came home from work Monday afternoon she planned to take a hot bath and shave her entire body. By the time I got home she’d put on a long black see-through negligee with black thong panties, and her hair was done up and she had her favorite perfume on. When I saw her my cock ached, but I knew she would want to be fresh for Mark when he arrived, so I settled for fingering her drenched pussy.

As the time neared, Helen became more nervous. To help calm her I poured her a glass of wine. As I gave her the glass, she said, “Are you really sure? We can still call this off before Mark gets here. ’Cause once he’s here, I don’t think I will be able to stop myself. My pussy is tingling already, and I’m leaking down my thighs.”

I took her in my arms and kissed her, then said, “This will be something for both of us. I want it, and I believe you want it too. Just enjoy what happens, and know that I love you.”

Helen sat down on the couch and drank her glass of wine. When the doorbell rang, she nearly jumped out of her skin. I answered the door and led Mark into the family room.

When he saw Helen in her nightgown, his eyes grew wide and he gasped, “Ah, ah, Helen, what’s going on?”

I came clean. “Helen told me once that she used to have orgasms when she dry-humped you, and since then I’ve fantasized about seeing her making love to another man. We decided you would be that man — if you want to.”

“Fuck!” Mark exclaimed. “I always wanted to make love to her, but she never let me. Every time we went out, I went home with blue balls and had to jerk off.”

Smiling, Helen walked up to Mark and put her arms around his neck. “You won’t have to jerk off tonight, because Chris wants to watch you fill me with your come.”

Mark drew Helen’s mouth to his, and they kissed with the passion of long-lost lovers. When the kiss ended, Helen took Mark’s hand and led him to our bedroom. As the three of us entered the room, I saw that Helen had placed six lit candles around the room and a chair had been moved closer to the foot of the bed. She kissed me and, giving my hard cock a squeeze, said, “Sit there and watch your fantasy come true.” I immediately sat down.

Helen turned to Mark and dropped to her knees, tugging on his belt. She pulled his pants down, and I saw a big bulge in his briefs. She took his shoes off so she could pull his pants off. Then she hooked her fingers in his briefs and slowly pulled them down — and out fell a cock that made mine look puny. It looked to be maybe nine inches long and really thick, and the weight of it seemed to cause it to hang down from his body like a broken tree branch.

When Helen saw it, she gasped, then let out a long groan as she took it in her hands. It was so thick that she couldn’t get a hand around it. She stroked it a couple of times, then looked at me and said, “This is what I used to hump on, but not tonight. Tonight I’m giving my pussy to this cock.”

Helen opened her mouth wide as she turned back to Mark, then took the first inch or two in her mouth. She groaned as she tasted that cock for the first time in years. She began thrusting her head forward and back on it, which brought moans from Mark. With her hand she stroked the part of his cock she wasn’t able to take in her mouth. As she increased her speed, the room filled with the slurping sounds of my wife sucking another man’s cock.

Mark groaned while Helen sucked him, and it was only a couple of minutes before he was warning her that he was going to come. She sped up her thrusts and tried to take even more of his cock in her mouth. When he gave a loud groan, I saw her throat moving as she tried to swallow all of his come. She got most of it down, but a little dribbled down the side of her mouth.

When she took the cock out of her mouth, it shot one last spurt, which landed on her cheek. She scooped the come off her cheek with her fingers and put them in her mouth while looking directly at me. In a sultry voice she said, “If you like what your wife is doing, you can show me by beating off.”

I immediately pulled my cock out of my pants and started to jerk off. Helen smiled, then stood up and pulled her negligee over her head and dropped it on the floor. She gave Mark a long kiss with a lot of tongue action, and when it ended she said, “Now, Mark, you can have my pussy.”

She turned him around so his back was to the bed and gave him a gentle push, causing him to fall on his back. She told him to get in the center of the bed, and as soon as he did, she laid down on top of him. She laid flat on his body with her legs together, and after a couple of kisses she started to hump his cock.

She slid her body back and forth on his cock so that the cockhead was rubbing her clit. “This is how I used to hump his cock, baby,” she called out to me. “Can you see?”

I groaned as I watched, and cranked up my jerking off. When Helen looked back at me and saw what I was doing, she smiled and said, “Now watch this.”

She parted her legs and rode farther up on Mark’s body until his large cockhead was between her legs. She paused for a second, then slowly slid down him until the tip of his cock was at her soaking-wet opening. She reached between her legs and grasped his shaft to raise it up a little. Then she slid down so his cockhead pressed between her vaginal lips. As she froze in position, she gasped.

Ever so slowly, her pussy started to accept that big pole. She whimpered as the cockhead slid in her with her labia stretched tight around the shaft. She paused for a moment, then took another inch or two in her. “Oh fuck,” she cried, “it feels like you’re tearing me apart, and I fucking love it!” She paused for another moment, then took more cock in.

I was certain Helen’s little body wouldn’t be able to take the whole thing in, but I hoped she would try. It was the hottest thing I had ever seen! It took nearly five minutes, but at last she gave one final push and Mark’s cock was buried in her.

As that happened, my cock exploded all over my gut and my hand. But my grunt was drowned out by Helen’s screaming as her body started to shake like I’d never seen. She wailed all the while she came, and came much longer than I’d ever experienced.

When she finally calmed down, she said, “It feels like your cock is all the way up in my stomach. I’ve never had a cock so deep in me. It feels like your fist is inside me. God, I love it! Come in me now.”

Helen raised her chest off of Mark’s and, using her arms for support, began to ride his cock in long, slow strokes. Occasionally she glanced back at me. She knew I could see Mark’s cock penetrating her pussy, and when she saw me masturbating, that appeared to encourage her even more.

Helen increased the pace of her thrusts and lowered her swinging breasts to Mark’s mouth. Then she rededicated herself to riding his big cock, moving her ass side to side while she thrust downward on it so that it was pushing her vaginal walls out even farther. I knew his cock was doing things mine could never do because he was both longer and thicker than me.

This really lit a fire in my horny wife! She increased her speed even more and began talking dirty to Mark, telling him to fuck her deep and saying she wanted his come deep inside her. They lasted for maybe another five minutes before he announced that he was about to come.

“Deep, baby,” my wife urged. “Pour it deep!”

Just as he let out a grunt, she screamed, “I feel your cock tensing up! Come inside me!” He grunted again, then raised his butt off the bed as if to push his whole body into her pussy. She screamed as she reached climax. As she collapsed on his chest, I shot another load all over my gut, already a sticky mess.

Helen laid there for several minutes trying to regain her strength. When at last she did, she glanced back at me and smiled when she saw my come-covered gut. Then she pulled herself off of Mark’s cock. As she did, her pussy made a loud sucking sound. She rolled onto her back and spread her legs so that I could see her dilated pussy with Mark’s come oozing out.

While we stared at each other, Helen began to rub her clit slowly with three fingers. I saw that there was a wet spot on the bed, and was confident it would get a good deal bigger before our night was over. After a couple of minutes of diddling herself, she saw that Mark was waiting with his cock hard again. She spread her legs and pulled her knees up toward her chest, then looked straight at him and said, “Fuck my pussy again. You’re not going home with blue balls tonight.”

Mark smiled and quickly moved between Helen’s legs. He aimed his cock at her opening and pushed all the way in with a thrust that made her grunt. Then she dropped her feet around his ass and locked her ankles together so as to hold on for dear life.

Mark began making long, deep thrusts, and each was met with an animalistic grunt from my wife. She cried out that he was in even deeper than before and she loved it. With each of his thrusts, their loins made a wet slapping sound. From where I sat I could smell the scent of their sex.

Helen began chanting, “Fuck me!” over and over. Mark increased the speed of his thrusts, and she got so aroused that she clawed his back with her fingernails, leaving a couple of dozen deep scratches. At last he let out a growl and rammed his cock all the way in her. I saw his balls contract several times as he spurted in her. Then he collapsed on top of her and they both gasped for air.

After that Helen took Mark doggie-style until she came. She licked his cock clean, then said that she was done for the night. Reluctantly, he got dressed and they open-mouth-kissed goodbye. He thanked me for sharing my wife, and I assured him I’d enjoyed the evening almost as much as he did.

As soon as Mark left, I went back in the bedroom and saw Helen lying on her back with her legs open and her dilated pussy oozing a river of come as she rubbed her mound. She smiled at me and asked if her performance was everything I had hoped it would be. I nodded enthusiastically. She raised her arms and cooed, “Then make love to your wife so she knows you still love her.”

We made love for a couple of hours, and I have to admit that Helen’s pussy, after all the stretching Mark had done to it, wasn’t as tight. She smiled and said, “Don’t worry, baby. Tomorrow my vaginal muscles will have me fitting you like a glove again. Too bad Mark won’t be getting any of my pussy from now on.”

When I asked what she meant by that, she said with a sly grin, “When his fiancée sees the scratches I put on his back, she’ll kick the bastard to the curb like I did. And as much as I enjoyed his cock tonight, he’ll never get near my pussy again.”