Sorry for your loss.
I agree it is abit personal to ask people that.
I agree, it's kind of like going up to someone and saying "are you ever getting married? Or why haven't you yet?"
Bit of a personal question. I'm the same, I don't want kids. But I also can't be bothered to argue or justify myself to people who insist I'll change my mind and that it's the best thing I'd ever do, I just don't know it yet.
I like kids. My sister is expecting and my best friend has a very sweet little girl and I love having them in my life. I just don't want kids myself.