In a final effort to justify himself, Trent tries to convince himself that Annie deserved what he did to her by being unfaithful to him. He dehumanizes her, as well, by saying she's an animal. Ultimately, he realizes that he was wrong.
She spreads herself wide open to let the insects in She leaves a trail of honey to show me where she's been She has the blood of reptile just underneath her skin Seeds from a thousand others drip down from within
Here, Trent is claiming that she has been promiscuous and unfaithful. He decides that because of her alleged acts, she is no longer worthy o being considered human.
Oh my beautiful liar Oh my precious whore My disease my infection I am so impure
Trent calls Annie a liar and a whore, but he still feels attached to her. He still has that last bit of her in the corner of his mind, and he can't get rid of it.
Devils speak of the ways in which she'll manifest Angels bleed from the tainted touch of my caress Need to contaminate to alleviate this loneliness I now know the depths I reach are limitless
Maybe it was all Trent's fault. He corrupted her. He destroyed her. He can't get past that, and he knows that unless he does something, he will continue to grow worse.
Oh my beautiful liar Oh my precious whore My disease my infection I am so impure