First of all, I am not clear whether she is writing based upon personal experiences or sound statistical sampling. Interracial relationships often become stages where partners act out these bizarre dynamics, creating an environment that portrays the minority partner as the objectified fantasy victim.
Many white partners act out the role of the adventurous rebel in their interracial relationships.
These stereotypes provide evidence for some of the unguided curiosity that initiates some interracial relationships. I am in an interracial relationship and none of these elements exist within it. Ms. Middleton, please do not base your viewpoint of me upon a Disney film and I will avoid doing the same to you. I am familiar with no studies which support the claims of Ms. Middleton regarding why and how interracial couples interact. If the story is based upon personal experience, my empathy is with you.