This morning, I got on the train to travel to the airport. I hopped on just before 5am, and for most of the journey I had absolutely no issues whatsoever. I was on my phone minding my own business. However, as the train did not have dedicated suitcase spaces, and because I was passing Central London and really did not want to leave my case unattended, I put my suitcase between my legs. Where I was sitting, I had a seat next to me and 2 facing opposite me. If anyone wanted to get onto the train, you couldn't sit directly opposite me, but you could sit next to me and opposite that seat. When I got to the stop before the airport, however, a young woman and her child got on the train. There were loads of empty seats on the carriage but she decided to sit near me. I don't have a problem with that at all. Smiled and let them sort themselves out. However, she then told her daughter to move to the seat you couldn't get to and for me to lift my case. I did initially, but then realised that it was too awkward. So I grabbed my case and said that I was moving seats to make it easier for us all in a polite tone. I had also been up since half 3 and couldn't be arsed with an argument or using my brain, and probably sounded knackered but there was no malintent my end. The mum turned around and muttered under her breath 'Or you could just move your case and not be selfish hogging a seat rather than move?' in a snarky tone, loaded with attitude. I moved but was taken back a bit. Was I the Asshole in this situation?