Subject: This is a work environment and this is harassment
I am writing to inform you that your proposition has been rejected. Due to both the fact that we are coworkers, as well as roommates, I would find it inappropriate to “visit the stacks” with you. I will reject all further offers at this time. If, in the future, I decide to entertain such an offer, I will inform you via correspondence.
Respectfully (not) yours,
Miss Taylor Caldwell
P.S. Stop fucking emailing me.