So after reading up on some more Portal story/lore, I found an interesting thing that spooked me a bit.
http://half-life.wikia.com/wiki/Caroline
Scroll down to the portrait part.
http://half-life.wikia.com/wiki/File...d_Caroline.png
Picture One
http://half-life.wikia.com/wiki/File...meone_Else.png
Picture Two
Please tell me your thoughts on who the girl in the background is. I Personally believe that was Chell's Mother (If I am correct, it's still speculation if GLaDOS was Chell's Mother).