While there are theories that Art is Sienna's dad, there is also evidence that suggests they are not the same person and that Art has connections and backstory separate from the Shaw family. Terrifier 3 may provide more answers regarding Sienna's dad's role in the franchise.
The controversy around Terrifier 2 stems from the extreme level of violence and sadism depicted in the bedroom scene, with reports of viewers fainting and vomiting.
