ichat problem, help please

[Youngst3r]

i'm currently in Atlanta and i video chatting with my cousin who lives in california around 12am pacific time because my neice wanted to talk to her auntie. Now, i have a macbook but the webcam doesn't work (sucks i know). So, basically i can see my cousin but she can't see me. So we were talking till 2am pacific time and she had to leave but she was still logged on because she was downloading her shows on itunes. So, i started talking to my gf who lives in oakland and i wanted to video chat with her so i approved her link. So, around 4am ish pacific time while i was talking to my gf she said that on her end of the screen she saw my cousin as if she was video chatting with my cousin instead of me. My question is what could have possibly happened to cause that to happen? because she said that it was pitch black and then all of a sudden my cousin appeared and she was moving around and so she took a snap shot picture of my cousin resting her head on her pillow staring at the screen and then after it went back to being black again and my gf totally creeped out. Someone help me because she basically thinks my cousin was the one talking pretending to be me which is creepy itself, but can someone give me an explanation to that please? Thank you