Wait now that I have reread this chapter, when Eliza (Lilith) said "But since I'll fall in love with your writing, you won't be able to speak a word to me anymore", does she means as:
1. "I will fall in love with you, so do not appear before me ever again, because that is the only way I can still be the Lilith"
or
2. "From now on, you can only communicate with me through your letters, for that's the only thing I love about you"
On my first read I though Lilith's words meant the first one but now I don't know. It is just a simple line about a fictional character within a fictional character but now I can't stop thinking about it lol.