So she slit her wrist open pretty badly and then just brushed it off?
She literally takes a sharp pen, stabs it into her wrist and splits her wrist open down her entire wrist, the way alot of people kill themselves going straight down instead of across.
But then she gets stopped by Adrian or his brother, and she goes "Gotcha" and then after that its like it was nothing more than a paper cut, theres no blood at all going down her arm, she falls on the floor and crawls and theres no sign of blood from her wrist, and she doesn't seem to be feeling any pain from it.
Thats a pretty serious injury, and there would be a lot of blood loss, but when we get a glimpse of her wrist during the institution scuffle its not even bleeding.