Trigger warning about dv coming up, not sure if I should add a spoiler. I'll edit post if it does. I've been telling Mr ogre about all this and he's connected the dots, things are starting to add up. He has partly narrated this.
Jack constantly plays the victim, when her life starts flatlining when people realise she is not that interesting, she invents things to bring the attention back onto her, and it doesn't matter at what cost. Anyway the kitten was a form of control for her, she prolonged it's suffering and it was a form of entertainment for her and that's bordering on psychopathic tendencies, along with whatever happened to her other pets, especially Cooper. She feeds on the misery of others and we can both see that she is likely to have been an abusive and controlling figure in her previous relationships. I would put money on L having been gaslighted especially as she is still in contact and they spend time together, given that Jack states 'she left' whenever questioned and has allowed other people to say negative things about L. We could go on a bit more but I don't want to start triggering others here too much without having a proper spoiler in place. The latest mass delete seems to be a huge gaslighting going on. It's going to bring lots of attention onto her.