Sensational Janine (1976)

Josefine is a Viennese teen very curious of sex. After she is deflowered by the neighbor Frau Reinthaler's lover Horak, she starts a very active sexual life. Following her mother's abrupt demise, a relationship with her stepfather begins. A lodger blackmails the two with the accusation of incest and, revealed as a pimp, he makes Josefine a prostitute.