Viernes girl (2005)

Chila is a young Salvadorean girl who enjoys school and music. Her older brother Hugo enjoys the ladies and has no regard for the fact that a thin bedroom wall separates his activities from his sister's. As the week progresses along with Hugo's romances, Chila gets creative with her ways of interfering. The battle between siblings takes a turn when Friday rolls around and Chila and Hugo discover that blood might be thicker than any wall.