Non fiction account of being cuckolded and humiliated successfully by first girl friend

It started out innocently enough with us incorporating toys into vaginal play.  She had purchased a purple jelly dong measuring 8 1/2 x 6 1/4.  I did not know what reaction I would get from inserting it inside her for the first time but I was rather surprised she took the entire length with ease on the first thrust, and upon doing so, i noticed her head cock backward and her mouth opened wide.  A smile quickly grew across her face, as if to say to me, this is what she's been missing.  I watched her shutter in orgasm after orgasm, and her cum for the first time in front of me .   Increasingly, I was being denied intercourse, not because she enjoyed denying me, but simply because she had lost complete interest in our sex life, saying "it was like watching paint dry."

It took me a while, but eventually I confessed to her a fantasy I had of watching her with her previous well endowed ex.   This became a regular conversation of ours and by then we both knew what a cuckold was but it was never discussed until one day she said to me, "I couldn't handle it If you ever cheated on me."  I knew she loved me so this was obvious but I told her that I wouldn't ever consider that but it might be ok if she had sex one time with another man who had more to offer her in terms of size.  She then surprised me with the fact that she had been corresponding with a well equipped man for quite some time now and that they had regular phone conversations.  I told her that maybe we should leave it at that and not take it any further. 

Then came the cuckolding.  She had told me she was working late after school on a big rainforest preservation project with the middle school kids she was teaching.  I expected her home late, what I did not expect was her to be in the mood for sex.  Upon entering her I noticed her vagina was gaping open and even more jaw dropping was the fact that I could not touch the sides and she was a oozing a milky white substance that I had seen before with our dildo play, but this time it was creamier.  I felt a warm sensation around me as her vagina made its way around me, but much looser than I had ever felt previously.  It felt like I was fucking an ocean, and the look of embarrassment on both our faces was priceless.  Scared, frightened even, I asked her if she had just used the toy and she smiled and shook her head.  She said, "I can't even feel you."  I asked her what was going on and she went on to tell me that she took me up on the offer.  She had sex with her hung lover.  Completely humiliated and mortified, but yet still intrigued, and buzzing with excitement I cam inside her already cum filled pussy.  Unable to contain myself, I had to ask her of all the details of her encounter.  She told me he was clean but that her sexual encounter with him was going to change things.  The new catch of our relationship, that she can have sex with him whenever she wants, when she wants, and there wasn't anything I could do to stop it, unless I wanted out of the relationship, but interestingly she didn't want me to leave. She assured me of all the things she did love about me, just not my penis and how incompatible we were sexually.  I confessed my desire to watch and occasionally she let me.  I never forget a cuckold session but my first one is something I think of every day. 

My first time watching I understood for the first time why she needed this.  Her satisfaction meant the world to me.  I kissed her forehead as her lover repeatedly entered her, touching her in places much deeper than I could ever even imagine doing myself.  He completely filled her and when he had an orgasm he would stay inside her, often in a spoon position, until his still large semi erect cock plopped on the bed.  It makes a thud noise that puts a smile on both our faces.  It got crazier than that, one night even doing a cock comparison.  He made me look and feel like a 5 year old boy.  We both enjoy the humiliating aspects to cuckolding.  She is constantly reminded how thankful she is each time she is with him and often compares us, knowing I get aroused and am able to orgasm too, but often quicker than I had previously.  We both mutually are satisfied with the arrangement and nobody else would be the wiser.  As a gift to me, she allows me to be teased and humiliated by other women.  Our love has deepened and we rarely ever have arguments now.  It's not for everybody, but it sure has rocked my world.