Connor, we'd be more interested in what you've done to encourage her to fulfill her lustful desire! Have you discussed it with her ... your desire to see her taken by a well hung black man? And if so, what did she say?
It this is truly a turn-on for the both of you, and you both still desire hot sex with each other, I'd say you need to make her your bride and enjoy a life of a cuckold. There are many married men here who wish their brides would take to regularly fucking black men. You may have been blessed with one.