sentences:  Also, in season one Andrea states that she has a sister, but this sister is never seen and never mentioned again.During the summer of 1991, while attending summer school with Brenda and Donna, Andrea and Brenda briefly became competitive when they both developed crushes on their drama teacher; the teacher decided to make inappropriate advances toward Andrea, which she rejected.The following summer, she worked as a day-camp counselor at the Beverly Hills Beach Club and became especially interested in helping a young deaf boy named Cameron.