The first rule of detaining a hostage is to maintain a level head. Don't attempt to connect with them on any kind of personal level. Stockholm Syndrome might work in the movies, but it's harder than it looks to get a captive to form an emotional attachment when one holds their very existence in their hands. Especially if time is limited. Without any food or water, she wasn't expecting her captivity to last long. There's no need to waste precious resources on someone who isn't going to remain a "guest" for long.