My boyfriends sister is ignoring me?

My boyfriends sister sent out a message to like 15 people on her facebook saying that she was bored and she wanted to talk to someone. A lotta people kept writing so I told my boyfriend to tell her to stop messaging everyone. He went into her room, steppedon her then took the laptop from her and deleted the messages. Then she called him a douche for stepping on her. He stepped on her back and hand. So I told everyone that she messaged that she called him a douche and so she wrote me saying "oh no i called him a douche the worlds ganna end now." i told my boyfriend, so he told his parents and she got in huge trouble. so she wrote me sayin shes sorry but ever since then she hasnt talked to me since then and we use to talk a lot. why is she ignoring me? i didnt do anything wrong.