"It's already quite late. Do you mind spending the night with us?" Lanni invited politely.
Ruby knew that it had nothing to do with time. This was a security measure. They were probably afraid that if she left the apartment, she would scheme ways to have someone change the results later, or even come up with some excuse to miss the test. The guest room she would be staying in will probably be bugged too, just in case she called someone to help her carry out the plot.
Even so, she pretended to be dumb. She couldn't blame anyone for being cautious against her. After all, the first test had made their little trust plummet.
So she nodded as though she didn't realize a thing. "That's alright."
Lanni stood up immediately, as though she was worried that Ruby might change her mind. "Then I will clean up the guest room. It has been uninhabited for a while."