It's not that she's necessarily preparing herself for the worst, but usually the kind of news that Isabelle gets is bad. People don't ask her to keep happy secrets, generally speaking, and she's become used to having to hide her own feelings about things behind a mask. Reid rushes to correct himself and Isabelle relaxes just a little, though she's still concerned, especially with the way he's shredding napkins into pieces.

All of that goes out the window when he speaks, and Isabelle has to clap her hand over her mouth to keep from squealing. It's probably undignified and not at all Shadowhunter-like and her mother would chastise her if she were here, but Isabelle can't help herself. Beaming wide, she jumps out of her chair to throw her arms around his neck, squeezing him in a hug.

"You did? That's wonderful, that's so, so great! Obviously he said yes," she gushes, feeling like an excited schoolgirl and refusing to care. Her adopted family is becoming more like a family by the minute, and Isabelle couldn't be happier. Her own parents had never been like this, never been so hopelessly in love, and it's nice to have reassurance again that it's real, and can happen.

Sitting back in her own chair, Isabelle bites her lip and tries to force herself to be calmer. "I'm so happy for you, Spencer, I can't wait."