Your dad is a policeman. The neighbour kid who bullies you always acted suspicious. So, as the good cop your dad was, he started paying more attention to what he was doing. But in the process, your dad forgot to pay attention to what your mom was doing.
Your mom went to yell at your bully. He fucked her and livestreamed it.
Your bully has turned your mom and sister into his obedient whores. He can use them as many times as he wants.