I came back from holiday recently on a direct 14hr flight . I knew this was long so paid extra for an aisle seat both ways to give me more legroom .
When I boarded and got to my seat a man asked me if I’d swap seats with a lady who’d hurt her knee . Her seat was in the middle of a row and I didn’t want to be squished up for 14 hrs so said no . She had no obvious injury eg no bandage / plaster / crutch but was I unreasonable in not giving up my seat .