Lillie knows that Yang Nina is exceptional, a prodigy. She also knows that her incident wasn't by accident.
"You see, Red Whiskers are non-hostile snakes, and you're a smart girl." She pointed out. "You wouldn't have angered them just so you could be bitten on purpose, would you?"
Lillie was intruding, she's aware of that so she added, "You don't have to humor me, if you're uncomfortable with it."
"No, no...It's fine." Yang Nina shook her head. "I wasn't going to be secretive about it, actually. So, whoever asks, I'm okay with telling them."
To be honest, Yang Nina wanted someone she could vent all of her emotions to.
She's thankful of Lillie that she would offer her ears, and listen to her ranting and bawling.
Yang Nina told Lillie all about her ex-best friend, who she's been with since diaper days. How she was betrayed, literally bitten by a snake, even after all the things she've done for her.