I believe there are only very few women who are into cuckolding. I have some experience as bull, but most from times when I was younger, the girls then were not married they had boyfriends who probably were not cuckolds, the girls I fucked were just cheting on their boyfriends. My last three girlfriends cuckolded me. Each of them did not intend to do this at the beginning. The first one was a fiance who cheated when we were in a long distance relationship, she cheated just one time with an old friend and got knocked up immediately, (we are both against abortion but I did not want to raise a child from another guy, we seperated immediately, she is married to the biological father now). Easy said, but it was huge drama. She first still loved me and wanted to stay with me instead of the biological father... I promised myself this must not happen ever again. So I told my next girlfriend: "I don't mind in case you ever fuck another guy and will forgive you as long as you use a condom and do not hide it from me afterwards. When I she was on a training course from work, could not see me for three months and lived for the time at a place where was nothing to do with young handsome guys door to door, who always made party... she could not keep her legs together and finally got fucked. Probably it would not have happened, had I not told her before that I would forgive her.
I realised that it is not good to tell your girlfriend you will forgive her when she cheats... but my next one and I had a long distance relationship from the very beginning and I thought what happend with the second one was just her, just to tell a girlfriend you would forgive her does not make her cheat and I wanted to fuck other girls while she is far away. So I asked her whether she would accept an open relatioship for the time we are in a distance relationship. She first told me she was not interested, since I would be enough for her. I told her that in case one of us cheats it will be difficult to admit if there was not open relationship aggread but that if the lie comes out later, the trust is broken forever and the relationship is doomeed. Therefore I would prefer an open relationship, just in case.... so we are honest with each other. She then agreed. Six months nothing happend, then I fucked another women, I told her, she was not angry, but one week later she had an ONS, two weeks later she had the next one.... three months later the next one who was not only a ONS but an affair over two or three months, then she there was no stopping her....
Long story short, in all three cases where a women did cheat on me or even cuckolded me for a longer time, it all started with a distance relationship and the fact, that she knew she knew I would not leave her in case it comes out and it was never planned. I expect if I would have wanted them to do this (I did not) and would have told them, they would have thought I was a pervert and had not done it.
I believe the best chance a women becomes a hotwife is if she knows her husband will forgive her a ONS plus she gets in situations where it might happen. If she has made once or twice the experience that her husband will forgive her, chances are she will do it again and again. If you tell her you want her to sleep with other men, she will think you don't love her anymore and refuse to do it.