I was at an airport the other day queuing up to go through security. Time was tight and I was in danger of missing my connection (so I hadn't just left it late getting to the airport). There was a woman in the next line which was moving slower than mine, and she asked the guy in front of me if she could go ahead of him, which he said yes to. I tapped on her shoulder and said actually I did mind and could she go back, which she did. She then complained to the people behind her that I was a bitch and she was pregnant - quite loudly but in french so I guess she assumed I couldn't understand her but I speak french. I said nothing but wondered afterwards if I should have let it go - it probably made fuck all difference to whether I made my flight.
I was very grumpy and stressed at the time but now I feel a little bad that I made someone else's day a little bit less nice, and small acts of kindness don't hurt. On the other hand, being pregnant isn't an illness and why should she take precedence? I don't know, obviously I can't go back in time to change what I did, and I don't feel terrible about it, just wondering what other people would have done.