Things stop being 'kinky' or 'just fun' when the person concerned doesn't want it, makes that known, and the other party disregards their discomfort. A relationship where your partner doesn't give a damn about you or your needs is
not a healthy relationship, and is
not a recipe for good times.
To the OP, you have a choice:
1. Confess, file a sixual harrassment claim and spend a lot of time and energy fighting your case.
2. Quit your job.
You did a stupid, stupid thing and now you need to face up to it before the situation gets any worse.
Dah bunny speaks sense.
Talk to her boss about her behavior, Talk to her boss about the fire alarm stunt, and go to the Union now. This woman clearly has no problem with coercing you into performing sixual acts, and is nothing more than a sixual abuser.
This sounds good to me, too.
Stick with her, there's a chance she'll eventually get bored and move on, but there's also a chance she'll eventually get bored and destroy you just because she can, and a chance you'll get stressed out and burned out, and a chance things'll get bad enough that you end up quitting, and a chance that you'll end up having to go to her boss/HR/whatever anyway. So I figure you're better of trying to sort it out now than waiting 'till your hand is forced

.