I (30M) have been friends with a a (30F) for many years now. We've always been platonic and been able to get relationship advice from each other about whatever situation we were going through at that time. I felt like we were completely open with one another and could say anything to each other. Little did i know there was a whole secret side of me she didn't reveal.

It all changed one day when my friend called me up in tears, asking if I could keep her company. Of course I said yes and did whatever I could to take care of her. I consoled her and tried to get her to talk to me. It turns out that she had cheated on her then boyfriend with a random guy and felt absolutely awful doing it. I did what a good friend should and tried to talk her through it. She recognised she shouldn't have done what she did but opened up to me about the lack of a sexual life with her boyfriend and how she had turned to getting herself off which eventually led to a guy she was playing online with persuading her to do things in person. Once she finally managed to get the courage to meet the guy, it was a done deal, he took her home and she had thoroughly satisfying sex. But then had called me when she felt bad about the cheating.

We spoke often during the next few days, and she seemed to calm down, and try to come up.with solutions for fixing her relationship. She talked to her bf about opening their relationship which he firmly shut down and she started spiralling again. Over the next few months, she cycled her way through a few guys, none of whom seemed to treat her particularly nicely, but did by all accounts satisfy her sexual desires. She settled into a pattern of cheating. I was beginning to build up a picture of the guys she liked. Arrogant, tall, hung, white guys (we are asian, as is her bf) who would text her to come over and she would willingly oblige.

In all this time I never really thought through why we had only ever been friends. I now realised I just wasn't her type. I had confessed to her previously following one of my breakups, that my ex was now with a white guy and had been with him before we had actually broken up. She had asked me about that at the time and how it made me feel. I admitted that I had thought about it and it had made me feel humiliated but oddly turned on too.

I began to realise that all of our conversations now were about her sex life. None of the interest in my life and nothing about the other aspects of her life. It was almost as if I was now her guy to report in her cheating to, as though so long as she told me everything that happened, she could keep doing it. I confronted her about that and she became quite distant with me and I really missed her.

So then I changed tactic and started to encourage it. Clearly she felt she needed a please to unburden herself with this. She became more open with me again, told me all about what she was getting up to. I can't lie, I was turned on by it all and I would probe her with questions about her preferences, what she enjoyed and lots more. One day we talked about how she wishes her bf would accept this part of her and just watch her have fun and be part of it. That led to a whole discussion about cuckolding.

And then I realised it. I was acting as her cuckold this whole time. She never had any interest in me sexually. But she did have a WMAF and cuckold kink and found that her good loyal friend was the only person she could talk to about it. Soon enough I became her cuckold in her mind and I have been treated as such.