getting wife in to it

trying to get my wife in to this ,what is the best was ???? she isn’t big into porn but i have got her to read some stories , iv seen her biting her lip when i talk to her about the stories while having sex and once or twice she has she want me to watch her have sex with some one else during sex ,not sure if she is into black guys tho, my cock is 8 inches and her pussy is VERY TIGHT !!!!