Flower

Flower is a movie starring Zoey Deutch, Kathryn Hahn, and Tim Heidecker. A sexually curious teen forms an unorthodox kinship with her mentally unstable stepbrother.
Rebellious, quick-witted Erica Vandross is a 17-year-old firecracker living with her single mom, Laurie, and her mom's new boyfriend, Bob, in L.A.'s San Fernando Valley. When Bob's mentally unbalanced son, Luke, arrives from rehab to live with the family, Erica finds her domestic and personal life overwhelmed. With Luke and her sidekicks Kala and Claudine in tow, Erica acts out by exposing a high school teacher's dark secret.