Part 1 I want to share the plot of the last movie I watched. The movie is
called "manslaughter.” Ping was a teenage girl who lived (nuclear family is redundant since you listed them) with her
father, mother, and (“her” extends to all nouns in this series) little sister. One day at a campus party, Pingping was
drugged, raped, and videotaped by one of her (feminine because it refers to Pingping) schoolmates, Su, whose father was a
senator and whose mother was local police chief. After that, Su begin to threathen Pingping
with the video he had, saying that he wanted a deeper relationship with her.
Pingping was too scared to report Su's crime, and she became nervous. (Not sure what you mean by “wired,” but I think “stressed” could work well here. Maybe replace nervous with stressed?)
Ping's mother noticed her weird behavior and tried to fogure out what
happened (“what happened” replaces “it”). One day, Su texted Ping and asked her out, claiming to delete (have deleted? Is this past tense?) the
explicit video (if he says he will delete it, you could say “saying he would delete the video”). Ping finally decided to meet him (grammatical object). She told a lie to her
mother and managed to meet Su, but she didn't know her mother was following *
Once Su
met Ping, he wanted have sex with her. Ping turned him down, so Su was soon
irritated and began to hit her. At that very moment, Ping's mother burst in
trying to stop Su, the situation was too chaotic that Ping's mother killed Su by
accident. The mother and the daughter were both too scarred to clean the mess,
but called Ping's father to deal with Su's body. Su's father is a particular fun
of defective fiction. He knew exactly how to cover it. It took him the whole
night to bury Su's body and clean the scene. Ping's father expected the police
would knock his door soon or later, so, after that night, he trained his family
how to make up a whole story to cover the truth. Besides, he made up a perfect
alibi.