Well, scene-writing is exactly what I came to B&B to learn back in 2011, so I am thrilled to get the chance to play with scenes in your company.
When I wrote it, my only thought for Lucy was to say that her heart was in danger, her aloneness calling out to Issac, such that he recognized her need for a friend to be good to her. But now that you put it that way, stuff in her neighborhood could very well be turning bad attention in her direction. Because of her contact with Vincent. Yes, that makes sense to me.
Shall I share the germ of my idea behind Isaac's cryptic, stormy comment? It's about how consequences for past adventures play out on the street.