Try to stall for time.
From Create Your Own Story
"Okay, okay. You got me." You called out to him. "Just give me a minute. I'm still on the toilet."
"Nice try, lady. I'm not falling for that one." He shouted back, and then you heard a loud bang as he tried to kick open the door.
"Hey, hey! Stop! I'm telling the truth!" Your cry fell on deaf ears as he violently kicked the door again several times. Suddenly, the door bursts open as the metallic lock pops off the hinge. You find yourself now face to face with a young, brown-haired man in security uniform, whom seems to be about your age. He initially stares down at you sitting on the toilet, then allowing his wide, boyish eyes to drift down to the white panties hanging at your ankle.
"I...I told you! I'm still peeing!" You feel your face getting hot as you shouted in embarrassment. You close your knees tightly together and yanked your skirt down over your crotch as the trickling sound continued. "Now stop staring!"
"Huh. So you were." He smirked with a smug expression, as if he had just made an incredible discovery. He reminds you of a prepubescent teenage boy who had just found out how women pee for the time. "Well, hurry up and finish so I can take you in."
"Wait! Please!" With one hand still holding down your skirt, you lounged forward with the other hand and desperately grabbed at his sleeve. "Please don't bring me back to that pervert. Who knows what he'll do to me!"
"Well...okay." Looking into your pleading hazel eyes, he scratched his curly brown hair and reluctantly agreed, which totally caught you by surprise. "Actually, I just started working here this past year. I hear about some things going on in the upper ranks that kind of bothers me..."
So he's actually a new guy who hasn't bought into their corruption yet. Nice, maybe you can get him to help you escape.
"I mean, why should the higher-ups get all the chicks when we just sit on the sideline and keep our mouths shut. Am I right?" He smirked at you again with smug delight, not unlike a rebellious teenager who had just learned a way to outsmart the system. "So let's make a deal: I won't bring you in if you show me a good time."
"Wait, what?"
"You know, let's do something crazy in here, like, you can give me a blowjob or something." He stood with his crotch right in front of your eyes, his right hand fidgeting excitedly with his pants zipper. "Nobody has to know. Not my boss, not my girlfriend, and not your boyfriend."
You begin to open your mouth to retort that you don't have a boyfriend, but that's besides the point. How will you handle this horny little creep?