There's a twitch when she feels the lie of it, but she's still not retreating. A scientist needs data in order to find a solution, and the more he talks the more she might be able to help.

"I won't tell anyone. It's not my story to tell." Don't tell Loki she said that, he might never forgive her. "Changing is scary, and it's painful, and sometimes it seems easier not to. Whether you do or not is up to you, but there are people who will help you if it's what you want."