The reason my wife needs a black cock

Small white cock is no much for a superior black stud.
Guess the wife is not interested in having sex with me. She was in a 12 year relationship with a black man before they moved on.
Her pussy when aroused begins to hang real loose and her pussy gets a big gaping hole. My little dick just flops out when it’s in her used black pussy. Figured she may need a massive piece of black cock in her pussy. Any suggestions on getting her to go black again.