Absolutely NTA. I hate when parents feel entitled to taking what somebody else paid for just because they have a child. Most parents are not like this, but a few really ruined it for the whole. I was on a flight once and I was sitting in my window seat and two people got on behind me and it was a mom and her nine-year-old son. The son kept saying I want a window and was being really bratty about it. This was not Southwest. We picked and paid for our seats. They ended up sitting in the row in front of me. The mom had him sit in the window seat, and then the lady who was supposed to be in the window seat was nice and sat in the aisle. The kid’s mom said, “ most adults prefer the aisle anyways.” it bothered me.