Kristen left the cafeteria first because she was really looking like she was about to faint. She must've been terrified that her darkest secret could be leaked anytime.
Honestly, I could leak it right now, but I wanted it to be spectacular, so Kristen didn't have any way to rebound from that kind of scandal. A hasty move would only lead to Kristen debunking the allegation and calling it 'fake news' from someone that hated her kind heart.
So I had to break her until she also shed all her facade in public, in front of her supporters. It was even better if I could set her up with Cerise.
I went to the bathroom again and turned on Helena's phone. I saw that Kristen hadn't sent any text, so I had to push her more.
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Helena: Kristen, are you okay? I saw that you look really pale in the cafeteria. I also saw that you're sitting with a new girl, is that girl your new victim?