Just wondering how many people have had this question and how you react to it. Myself and DH are 32 but I suppose we look quite young and we’re not married. However, we’ve been together for 13 years, we live in a mortgaged house, we have one child already and both have professional jobs. I mention these things because we are seemingly living a ‘grown up’ life.
When I fell pregnant with DC1 (planned!) we had quite a lot of ‘were you planning on that?’ questions. I was always taken aback but answered ....yes 
Now we are expecting DC2 and we are STILL getting those questions. My BIL even asked DH today. They don’t have a very close relationship and he just messaged after their phone call ‘that took me by surprise. Congratulations. Was it planned?’
Does this mean anything? Do we need to get a better answer to this? Stop finding it rude? It just seems such an incredibly odd and invasive thing to ask someone.