Probably the most erotic, sexually exciting thing I have ever seen in my life is my wife fucking another man.  I found this out one day, quite by accident, and it has changed my life.

I work for a security company and as a result of employee discounts I have a state of the art security system in my own house.  In addition to all of the door and window alarms, motion sensors and the like, I have remote cameras all over the place, inside and out.  The cameras are wired so that any unauthorized entry will turn them on and they are hooked to six VCRs that will tape everything when they are on.  They can also be turned on for testing and monitoring by an override switch.  The system is so state of the art that I frequently bring customers to my house to demonstrate it.

 I had a good prospect coming over to see the system and I had come home to run a quick check on the system to make sure everything was working right.  I turned on the TV monitors and began to cycle the system.  Front of the house, both sides and back of the house working fine.  Garage, kitchen, family room, basement 1 and basement 2 no problems.  Master bedroom, guest ro…and I stopped.  I had seen a glimpse of something as the master bedroom flashed on and then off the screen.  I selected MBR and as the picture came up on the screen I saw my wife Marcy sucking my brother-in-law's cock.  I was stunned.  I had always thought that the two of them didn't get along, but then I'd always thought that Marcy was a faithful, loving wife. 

I hit the record button on the VCR and then I finished the check on the rest of the system.  I was waiting at the front door when my customer arrived - I wanted to make sure that he didn't knock or ring the doorbell and disturb Marcy - and after asking him to keep his voice down so as not to disturb my wife who was sick and upstairs resting, I led him into my den.   I demonstrated the system, omitting the MBR (my wife's sickness, you know) and he left after giving me a healthy check as a deposit on the new system he ordered. 

As soon as he was gone I turned the TV on and selected MBR.  Marcy was sliding up and down on Tom's cock and I wished that the camera system had sound, but of course it didn't.  As I watched Marcy tilted her head back in a way that I knew only too well and in my mind I heard the words that she yelled every time that she had an orgasm:

 "Yes, oh god yes." 

Marcy climbed off Tom and went back to sucking his dick.  It took her several minutes, but she did get him up again and then she rolled over onto her back and pulled him on top of her.  I watched as Tom fucked her again, her long legs flailing the air and I was amazed that I hadn't gotten angry with the two of them.  All that happened was that I developed a raging hardon.  I opened my briefcase and took out my cellphone.  I waited until they were through and then I called my home number.  Marcy took the call on the bedside phone.

 "Hey babe.  I got off early today and I'm on the way home.  Should be there in a couple of minutes.  Put on something sexy.  I've been thinking of you all day and I'm in the mood.  Love you." 

And then I watched while Tom frantically grabbed for his clothes.  I heard him pounding down the stairs and then I heard the back door slam.  I smiled and walked to the front door, opened it and then slammed it shut, "Honey!  I'm home."  I headed up the stairs wondering what I would find.  Marcy had only had enough time to straighten the bed, slip on some heels and pull on a sexy black nightie.  She'd had no time to clean her cunt and I wondered how she was going to handle my finding her so wet. 

I took her in my arms and kissed her, tasting Tom's cum.  I pushed her back on the bed and knelt between her legs.  Pushing her nightgown up I put my hand on her freshly fucked pussy and said, "You seem to be really wet."

 Marcy nervously said, "I've been horny and thinking of you all day.  I was just getting ready to call you and see if you could come home early when you called me.  I need your cock so bad.  Fuck me.  Fuck me now." 

I started to lower my face to her pussy and she panicked, "No. Not that.  I'm too hot for foreplay.  I need your cock in me.  In me now.  Please baby, don't make me wait."

  I stood up and undressed while I watched her fidget on the bed and she didn't relax until I was between her legs and my cock was moving into her cunt.  I don't think I've felt anything as good as it felt to slide into her wet, cum filled cunt and I know for a fact that I'd never had a more satisfying fuck before then.  We fucked for hours and I just could not get enough of her.  She had orgasm after orgasm and when the two of us finally collapsed from exhaustion Marcy said:

 "What got into you today?  You've never been like that before."

 "I don't know sweetie.  Something about you triggered something in me today."

  "God" she said, "I hope we can figure out what it was.  I could learn to like it."

I installed motion sensors on the living room, family room, and master bedroom cameras and now they record whenever someone enters the room.  Marcy thinks that the system comes on only when there is a break-in and so she has never caught on to the fact that she has been taped with all her lovers, and there have been quite a few.  There are even a couple of tapes of her with two guys at once and these are my favorites.  She still doesn't know what it is that has turned me into a sexual madman who can barely leave her alone, but she loves it.  I have spent many hours watching the tapes of her and I never get tired of it.  One of these days I will probably show her the tapes and tell her that I want to become an active participant, but I’m in no hurry.  We are both having a grand time right now, why take a chance on spoiling it?