Your mother has remarried and, for better or worse, Gwen is now your older stepsister. She's not too happy about having to share either.
You can't help but think that being captain of the cheerleaders has gone to her head. She always acts arrogant and even ?????, it's annoying.
You're sitting there trying to watch a movie and of course she had to be annoying,
"I can't believe you like that ????. You've always been so childish!" she says laughing and looking at you with mocking eyes.