Wife's Ultimatum

It's been over a year since I promised my wife I would set up a BBC gangbang for her , she has asked for 3-5 respectful non smoking black men to fuck her senseless , impregnate her , cover her with cum .
I am very concerned about her safety if I set this up. First off she loves to (party ,ski , hit the slopes) and she would never do it with out that but what if some of the guys join in and maybe that stuff makes them too aggressive? I would be outnumbered at minimum 3-1 , 2nd I know guys in groups can be wild so what if one of the guys got out of hand?
Another issue is she desperately wants to have another baby And My cum don't seem to be doing the trick , artificial insemination is expensive and she is adamant that I am the only white guy she will ever fuck again , she will only fuck black guys ! Which brings us into a rather awkward situation if she was to get pregnant with a black mans baby , she wants this to remain discreet but wants to give birth to a interracial c***d ( I Can't figure it out lol) I'm not sure how in the hell would could explain to our families that our newborn is interracial . Her ultimatum was simple either I hook it up or she will , her regular BBC freaked out when she mentioned him impregnating her so he will never fuck her bare and he says sharing her with me is enough so him setting up a gangbang is impossible . I'm really nervous about her going at this alone so I need suggestions on what to do , sometimes I regret taking her down this road cause look what I created ! A BBC obsessed wife