Alright guys her is my wife taking a Big Dildo, is she Black Cock worthy

Alright guys her is my wife taking a Big Dildo, is she Black Cock worthy? I want to see her Blacked but she is very hesitant. She said she would try another white guy with a big cock and I think if I get her to do that she would be more open for the Big Black Cock. Any suggestions on how to get her to agree to a Big Black Cock?