Stiefgeschwister angelegenheiten episode 1 - ich hasse meine stiefmutter (retold)

Amanda is only five months away from graduating from High School. It's been a struggle living with her stepmother, Ayla Pierce. The two of them don't get along very well. Her big step-sister Tasha promised Amanda that when she graduates from High School, she can live with her and her boyfriend Tristen. But this one night changes everything; she discovers that her stepmother is downstairs fucking her classmate named Ash. He is a guy that Amanda has a crush on, and her stepmother is fucking him. How will Amanda handle the situation?