Think she would try black?

My girlfriend is half black and I am white we are 18 I'm her first I have a fantasy of watching a hung black man fuck her, I got her a black dildo and she has used it but said it hurt her pussy a bit so I'm.getting her a smaller black one maybe 6.5 by 5.5" I sort of told her my fantasy and she said she only wants to fuck me but would do a threesome with a black guy and only blow him, I asked her to play into my fantasy and she said she would say things like fuck me with that black dick for me while I use the dildo she said its not a big turn on for her but she gets the appeal I'm planning on using the black dildo on her while watching videos of hung black men destroying pussy, do you think with enough of this she will agree to fuck BBC? She said she only wants to fuck me because its a big deal to her she wouldn't fuck just anybody.