Hi Brother!
I'm Muslim too. My wife don't believe Hijab, but she's very loyal and don't like such fantasies. I don't want to be your Shaitan! Because he is Rajeem of course 😉
But I think u should not go right to the point at the first place. You can try to make her open to sth's much lighter than cuckolding, and believe me, it takes too much time and your burden. Be patient and Inshallah u r lucky one. Love from Iran 🤲🥰