Fiona was an acquaintance Noah didn't mind having. So when he thought of walking her back to her place, that was just an excuse to avoid being left alone in the company of those two demons who were taking advantage of the aftereffects of his transcendence. Mephisto was fine; Noah knew he could stop himself when Noah told him 'no'. As for Sagan, Mephisto drew him a very strange image… very different from the childish one Noah knew.
However, it was apparent even to Fiona that something was coming out of Noah. It's just that… she thought it was just a pheromone explosion? Seriously?
The smile on Noah's face froze as his eye twitched visibly. Fiona actually caught it before she waved her hand. "It's fine, it's fine! I mean, it's none of my business, but… the explosion is too strong! You must be having a lot of sex with your girlfriend. She's very lucky, isn't she?"