Since Secily's Matesprit died, she couldn't deal with her death very well, she wished she could have saved her at the time, but it wasn't possible...
It had been days since you saw Secily, you would call her on the phone and she would say "It's okay.", or "Don't worry." But there was clearly something wrong. You were moirails/friends, but it was difficult to know things about her life, she never said what was really happening. So one day you decided to go to her house and ask if she wanted to go for a walk. After much insistence, she accepted.
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You walked for a while, and were talking about basic things, until you decided to ask what happened, since you hadn't seen her in days. When you ask, she goes to a nearby bench and sits down, and you sit next to her.
– "About your question..."
She was still sad about what happened, but she wasn't going to break down there in that square where anyone could see.