SHARK TEETH by Sherri Winston

But Mama promises things are different now. She's got a good job, she's stopped drinking, stopped going out every night-it's almost enough to make Kita believe her this time. But even as Kita's life is going good, she can't shake the feeling that everything could go up in flames at any moment. When her assistant principal and trusted dance coach starts asking questions about her home life, Kita is more determined than ever to keep up appearances and make sure her family stays together-even if it means falling apart herself