@Revenant62 you're assuming a whole lot there. The writing is not consistent enough to confirm Umi's intentions - it's intentionally left vague just so the author can turn it either way, to his convenience.
We'll just have to wait a couple dozen chapters to find out!
@raltzero Could be either. (Por que)(Porque)(Por qué)(Porqué) all have different meanings/usages, but people use them interchangeably (they shouldn't)
For example, in @justforthelulz 's meme the correct term should be '¿Por qué no los dos' (why not both?); in your case, the closest to a...
Him not killing himself and they not getting caught is probably the best case scenario
Still, really meh and rather unfitting considering the other stories