On her knees

With Mark's cock free of the confines of his pants, it stood proud and tall. As Kate grinned at Mark she gently stroked his hard meat. Without releasing his cock from her grasp, Kate slid off her seat and positioned herself on her knees in between Mark's legs. Mark could only whisper "Holy shit" as she brought her face to within an inch of his cock-head. Tentatively her tongue reached out and licked the pulsing head of his cock. It took all his willpower to muffle his groans as Kate licked up and down the length of his shaft. A drop of pre-cum leaked out but Kate was quick to lick it up with her tongue. She stuck her tongue out to show Mark the cum before closing her mouth and swallowing it. Kate could feel Mark's cock pulse in her hand and she giggled at the effect she had on him.

More pre-cum leaked from Mark's cock and using her thumb Kate smeared it around his cock-head. With her mouth perched over his cock, she looked up at Mark and said, "Mmm, you've got a pretty hefty tool there. Watch this." With that she opened her mouth and slowly started taking his dick directly into her mouth. Mark's eyes went wide as he felt his cock bump the back of her throat and then continue down her gullet. The entire time she maintained eye contact with him as she swallowed his dick. The heat, tightness, and wetness was something completely new to him. He had fucked asses and mouths before but those had all been when time was stopped. When time was running it was something entirely different.

Kate withdrew his cock to take a deep breath before she plunged back down. His enjoyment must have been clearly readable on his face because he felt Kate cup his balls and begin to rub them. He immediately felt his balls tighten and knew he was close. In a strained whisper he told Kate, "I'm...almost there." This seemed to encourage her though because she doubled her efforts. Soon enough he was pushed over the edge and closed his eyes in orgasmic bliss. But immediately opened them when he heard footsteps approaching. To his right he saw a theater worker with a flashlight climbing the stairs towards them. Mark panicked.