You and Teresa were friends since the maze, you were very disappointed when she betrayed you and all the people you trusted. When Thomas and the others kidnapped her to take answers from her for where WCKD kept Minho

At some point they have to discussed some things and left you to watch over her and make sure she doesnt escape. She looked at you and spoke up

"I'm sorry-... are you mad for what i did?" She said with a sadly voice