looking for tips on how to black my gf.

Is anyone in san francisco up to meet at power exchange? My gf doesn’t know my fantasies but i want to see her get destroyed by a big black cock…preferably a thug looking black guy. But anyone will do. I try to go to clubs and expose her to black guys more or when we walk around downtown san francisco, she gets hit on a lot and if they are brazen, they will touch and feel on her. I get turned on just thinking of it. Any who, she’s very submissive and i think maybe power exchange would be easy to get her blacked or my question is if i asked one of those black guys who hit on her in downtown to meet us and then i would let him just have her…..again, she doesn’t know my plan, but i pretty much would let him creep on her and she would cave in. I’m almost certain. I want this so bad. heres a pic of her and what dress i would most likely have her wear.