Sara storms over to her computer desk and types furiously for a minute, then snatches up her purse from next to it. "Are you trying to stow away here!?" She snaps, rummaging through it while you lie in the backpack, with chills going down your spine.
"Guess not," she finally fumes, and abruptly walks away. "You better prepare yourself for when I get back, because it's not going to be an easy life for you from now on!" She yells back, before leaving and slamming the door.
Even though you're afraid of what's going to happen now if you get caught, you steel your resolve and commit fully to your one chance of getting out of here. That is, until a couple of hours later when the door opens again, and the sound of mewling puts you into panic.
"Shh, Pixie, shh!" Sara soothes as she sets the soft cat carrier down, unzipping it. "Good girl. It's okay. You're just here until we find my runaway, and then you can go home to your owner, okay?" You realize what she means as she goes on, louder: "For his sake, I hope he comes out while I'm still holding on to you. I hope you'll bring him back to me, but who knows? A little predator like you! Yes you are! Yes you are!"
While she's cooing at the happily-purring cat, feeling sick to your stomach with despair, you finally admit defeat and get up to turn yourself in. Hiding from humans is one thing, but, especially considering how fishy you still smell, there's no way you're hiding from a cat. You can't be killed, but you don't want to go through the experience of having 'Pixie' find that out about you. "Wait!" You cry out, squinting in the sudden light.
Sara's sitting in the middle of the bedroom, playing with the sleek, happy looking calico in her lap. At your call, both of their heads turn, and two sets of bright green eyes fix hungry gazes at you. "Well, well, well." Sara keeps talking as if to the cat, though while continuing to stare down at you. You're relieved to see her keep her hands on it, though, holding the creature closely. "And there he is! No boy toy for you tonight, Pixie! At least none of the bits he NEEDS." She growls darkly.
You know that's a threat to cut some other bits off of you, maybe your ear or something, but what's even worse is that if she tries and fails that then she'll just try to take out her frustrations on you until something works. So you prostrate yourself to beg, hoping to at least convince her not to try to permanently damage you. Or, failing that, at least hoping that if you can't convince her, then maybe coming clean about your immortality will spare you the worst of her ire.
...
What happens?
1. You successfully convince her, and keep up the charade. She tortures you enough to feel you've learned your lesson.
2. No mercy. You have to come clean. Since you can't be hurt physically, she'll just have to traumatize you mentally, so you can't ever dare to defy her like that again.
3. Pixie surprises Sara and jumps out of her grasp, stealing you! And... giving you a chance to escape!?