It's worked so far, so you continue keeping quiet.
Jessica eventually grows bored, though as she rests, her eyes begin to drift closed. Her belly grows louder with every gloan and glorp until you hear a faint glub from it, and her victim suddenly stops moving...
Jessica lets out a deep, relaxed sigh, and one last gentle burp... She smacks her lips, but soon her breathing slows down. After several long minutes, she begins to snore...
She's still resting up close to the bars, close enough that you might be able to grab her key ring. However, there's the obvious risk of waking her up.