Aurora is a cruel girlfriend. She likes weak boyfriends because she can take out her stresses on them and she can humiliate them however much she wants. In addition, she likes the fact that they know they are lucky to have her because she is way out of their league so they constantly feel like they owe her and want to prove their worth to her. She took advantage of that and slapped her current boyfriend hard because she pretended she wanted to see if he was a real man.