The screams are coming from William's room...
From Create Your Own Story
You and Lord Kellar both dash for the stairs, he with his shotgun and you grabbing a pistol from one of the wounded men. You race to the top of the stairs where you hear the screams emenating from William's room, cold and high with pain. Your blood runs ice chill, dashing over to the door and flinging it open, Lord Kellar at your side with shotgun aimed.
The light from the hall casts upon a scene of horrors. A fleshy form, man-like is bent over another form laying on the bed, huge and shiny with sweat. Black stiff hairs stick out of the back, leading up to a long neck and jaw and forehead bristling and hairy. The arms and legs are long and distorted, stretched and animally muscular. The legs and hips pump violently in a way that initially confuses you, before you realize what it's doing. Trapped beneath the beast is Madeline, bleeding profusely from dozens of fat gashes on her smooth skin, screaming as the beast ruts with her.
The monster turns to face the sudden intruders and you freeze as you recognize the eyes beneath the distorted facial structure.
It's William.
Lord Kellar bellows something, pointing his shotgun at the beast. William hasn't completely transformed yet but the beast has taken over. Your fingers feel numb on the trigger of your pistol, knowing what has to be done but feeling as if your submurged in Arctic water.
