I was in your exact situation once.
This is what I did:
1. Make sure her life is as stress free as possible. A. Your providing more than the family needs aka no financial stress.
2. Make sure you are helping her with the household chores. A. Your cleaning the toliets instead of her or you have house cleaners taking care of that. B. Your helping out with kids if you have children.
3. Give her plenty of Girls out time. She can take a weekend with her girl friends, get a massage, go out to lunch or dinner with her girl friends.
4. Spoil her with new fashionable clothes, jewelry, help her with self image, gym /palates/ yoga classes, trainers, makeup make over what ever she wants or needs.
5. Make no sexual demands or requests till you have done all the above and she feels as stress free and happy as she can.
6. When you’ve accomplished 5. Take her on a couples vacation to a sexy location and act like newly weds.
7. Ask her to fulfill one of your dreams, take her to a topless resort.
8. Keep going ask her to play the “pick up” game at a business hotel bar one evening. She goes in sits alone at the bar flirts with me. while you watch.
9. Let her see how wild and passionate you get with her after witnessing other men lusting for her.
10. Keep repeating 5-9, She will eventually feel that her being sexual makes her marriage stronger, better, makes you a more caring, giving, loving husband.
11. If she does believe this and then refuses to indulge your cuck fantasies divorce her. Find a slut. Marry the slut and live happily ever after. Thats what I did.
Been living the cuck dream for 13 years now.