Respuesta :
I think you should ask your sister a little more of what happened and why he did it. Then you should go find the boy and perhaps talk to his parents cause it's not right for him to do that.
Answer: Act off of how your sister reacted to the situation. Did she cry? Did she want to punch him back? Figure out what emotion she was feeling whether its the "lets get him back" or the "comfort me i'm not feeling good" kind of thing.
Explanation: