You find a two story farmhouse: no longer does anyone live here. The back door has been broken open by teens looking for a place to party. Inside is a heavy musky mildew smell...
The source of this powerful odor turns out to be a cum splashed pair of panties thrown into the corner of the former living room, a grapefruit sized mass of white fungus has grown from the panties on the semen fuel, and it throbs with life.
What happens next? Edit the wiki to add some options...