Coincidentally, Fily was also thinking the same as Venedette. And since she was now aware of her connection with her mother, she was trying her best to not learn anything new about their research and get away as much as possible when her friends were talking about important things.
She couldn't risk being the group's loophole again. And as much as she was aware that Halma was on their side. She still could not trust the lady whose sole purpose of existence was to spread despair to her surroundings.
Either she'll have to cut this connection with her mother first or cover her eyes and ears whenever there's new information being shared through their meetings.
Just like what happened earlier when Gem was talking about her experiences with Solitude, and how there was a new training manual called 'Astral' inside of it.