回複：急問:家庭地址被別人用,對我們自己的申請有害嗎?

I do not think this will have any negative effects on your future life, especially on GC application. People change address all the time in U.S. Your 中國同事 just use your address for communication, that is very common in U.S. and will not affect you. If she used your address to do some illegal things (for example sell drug), you would have trouble about that.