Freezing cold

It’s been cold in our bedroom, and we’ve been unable to figure out why. We’ve been resorting to the space heater every single night.
Then last night, Dan rolled over in bed, and happened to peek over the edge.

Lenore, aka Babygirl, has been sleeping on the vent. We tried to get the picture of what Dan actually SAW, which was Lenore on her back, paws up, with her entire body covering the entire vent. But she saw the cell phone and tried to look innocent.
Fail little kitty, big fail.