Not the biggest issue in the world I know. So when I got married I kept my surname, I had always intended to, my husband was completely fine with it and if anything encouraged it. However our 6 year old son has told us he's been getting comments at school about it since it came to light, has been told it means either we're not really married or I'm not his real mum by other kids and even a teacher told him it was "strange" (which I think is out of order). It is upsetting him, though, and he asked me why I don't have the same surname as him, and when I explained he asked if it was too late for me to change it.
I always wanted to keep my surname as it's part of who I am and I always found it a bit of a sexist tradition, but if it's upsetting my son is it horrible of me to keep it just for my own pride? I already get called "Mrs hisname" at some functions and on some letters anyway!