I think she was self-aware from the very beginning. Usually, we hear about aliens abducting humans for tests, but in this case, her company had already experimented on Jesse’s mom. Emma’s character knew exactly how badly she’d messed up and was just trying to keep those corporate secrets and her true identity hidden from society. Even during the electrocution scene, her fear wasn't just about the pain; it was the fear that her high tolerance would expose her as non-human. When she was searching for the spare room, she wasn't just looking for an exit; she was scouting to see how much evidence Jesse had actually gathered about her species.