@Nikoko I think it's because she just revealed the biggest, most fatal, secret of her people. Not to mention she wasn't exactly in the best state of mind in the first place.
@Pyoro I think you might be mistaken, it doesn't look like she is teaming up with him to deal with the monsters, I think that he is about to team up with the monsters to deal with her (money).
You know, that guy at the end is probably one of the people given the nickname of Dragon. And if I had to guess he's probably trying to court her. (Though that's a bit more obvious)
Wow, that chapter moved at a breakneck pace. Especially with the delay between catching up and this update, it felt like it just needed to end the story as fast as possible.