i had an embarrassing fantasy about my fiancé being a strict boss at work

ive been in a relationship with my partner for years now and we are engaged. one day while hes working late at his office, ive started to imagine him as some sort of strict boss figure who might punish me or test my loyalty. it sounds crazy but these fantasies turn me on so much i cant think straight. im worried what this means about me, that maybe im secretly craving something like this. weve always had a pretty vanilla relationship and i know hes not into anything kinky or taboo. its just hard to control these thoughts sometimes. am i the asshole?