Take a look at your EXIF data:
Exposure: 0.002 sec (1/500)
Aperture: f/10.0
Focal Length: 55 mm
Focal Length: 55.0 mm
ISO Speed: 1600
Exposure Bias: 0 EV
You'll notice that your shutter speed is fairly fast at 1/500th of a second. This controls how much ambient light (the background lighting) gets to the sensor. Now look at the f/stop which is f/10. This controls how much light from the subject gets to your sensor. f/10 is about what the human eye sees as far as what's in focus. Your ISO was pretty high as well at 1600 so it looks like the camer metered for the bright spot on the floor.
If you can choose what metering type to use then meter for the brightest spot in the frame and take a picture to see what you get. Sorry, I can't be more specific because your settings are going to be different each time. You probably could've dropped your ISO down to 200 and it would've taken your shutter speed to around 1/60. Not sure if your subject would have stood still that long though.