The title 'fill me with your poison' in a 'Twilight' fanfic context could imply a number of things. It might suggest a story where a character is metaphorically 'poisoned' by another's love or power. Maybe it's about a character being drawn into a dangerous or alluring situation within the Twilight universe, like a vampire's charm that is both irresistible and potentially harmful, similar to poison.
In this 'fill me with your poison twilight fanfic', the use of 'poison' could be symbolic. It could represent the forbidden or dangerous elements in the Twilight world. For example, the love between a human and a vampire can be seen as a kind of 'poison' because it goes against the natural order. The fanfic might delve into how characters handle this 'poison', whether they embrace it or try to resist it, and how it affects their relationships and their place in the Twilight - esque world.
I haven't read this specific 'Twilight' fanfic titled 'fill me with your poison'. However, generally, a 'Twilight' fanfic might explore different aspects of the characters from the original series. It could be about a new relationship dynamic, a different take on the vampire - human - werewolf triangle, or perhaps a darker side of the Twilight world. Without reading it, it's hard to give a more in - depth analysis.