So, a bit of back ground first. My family is not close. Lots of fighting for no reason etc, etc. My mother has NO filter and tells her co-workers everything that is going on. Currently, my youngest brother does not have anything to do with any of the rest of the family. I rarely tell people this, as I don't think it anyone else's business.
So one day, against my better judgement, I took a job at the same office as my mother. This places runs three shifts, and I work opposite her, so rarely see her. However.
So, I'm working away, making deliveries, doing my job. I stopped in one office and dropped stuff off, and stayed to visit a minute. I counted one person working there as a work friend, others as only co-workers. On my way out the door, one of my co-workers said to me "hey Mmirth, is your brother still not talking to your mother?" I ignored this most inappropriate for work place question and continued on my way out the door. Co-worker repeated the question which I again ignored. There was a lot of conversation going on and phones ringing but I know that co-worker realized I was not going to answer her question. My work friend however, did not realize I was ignoring this inappropriate question and said to me, "hey Mmirth, co-worker asked you a question." Then I realized, everone was waiting for an answer. Stupid me.

So I simply said to my co-worker, "yes, I know, but her question is none of her business, totally inappropriate for the workplace. I'm ignoring it." I then turned and left the room. The look on my work friend's face was priceless. Co-worker's eyes bugged out.
This conversation happened three hours after the mandatory inservice on workplace behavior. All realized I could report them for harrassemnet.