If you look to the right of the toilet, you'll see a mirror clip. You can see in the mirror above the sink that there's a mirrored door to the left. The left portion of the picture is the door with the mirror — not a shower toilet!
We've got a woman in dark pants and a dog with dark fur here. This curious pup just happened to walk up at the perfect moment, making it seem as though its back legs and body are the woman's bottom half.