Victims can become perpetrators. Domestic violence doesn't require the victim to prosecute in the US for a reason: they often dont. Instead its the government's responsibility. Victims of domestic violence are still victims even if they love the person committing it. Rape is still rape even if the victim consented in the past, yesterday or 30 seconds ago. Beating someone is still beating someone is still beating someone even if they come running back.
Come on man. Even if you look down on her as a person, dont deny diddy's actions.