Surprising glass reflections

This was not a result I expected. I was going to shoot some snapshots of my son's second birthday. I knew he would have a window behind him, so I set my camera to ~properly expose for outside and then lit the room with a bounced flash.

In the first shot I got exactly what I expected, both the room and the outside are exposed reasonably well.

In the second my angle to the window was such that the indoor scene got reflected. My camera settings were otherwise the same.

Here is the part that seems strange to me. The reflected inside scene is a lot darker than the outdoors. Isn't it weird that I cannot see the brighter outside through the reflection?

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That is kinda strange....a bright outside would usually negate the reflections from inside. Maybe your angle changed enough to allow a screen to block more light than from the first pic?....just a guess

My guess would be that the second image has more light reflected towards the camera from the flash due to the angle you are at to the window. The first image has the camera with a greater angle meaning some of the flash is directed away from the lens.

This would mean that the room is relatively (from the cameras pov) lighter than the outside.