My mistake (wanting to be cuckolded)

So about 7 years ago my wife and I stopped having sex frequently. It went from easily 4 times a week to once or twice a month. After a about a year of this I picked up her phone and it turned on and she had been looking at cuckold porn. I got so upset about it. I could not believe it. She never watched porn with me and here she was watching married girls get fucked by big cocks. I left for the day and would not take her phone calls. I came home and she fucked me like she rarely ever did. It was so hot and passionate. We fucked a lot again for about a year. She said she watched the porn to try to get sexual feelings back but would not talk about it or watch porn with me. But I still could not come to grips with the idea of what she was watching. So after a few years of less sex again I started thinking about it and realized my cock is not big and probably not the most fulfilling for her. So I thought about it for a long time and realized how hot it would be for her to cuckold me. I have now been trying to get her to make me a cuck but she keeps saying she is not interested in doing that. But I think it was because of how insecure I was when it was her fantasy that I think she is worried that I would get upset again.