Exactly that! Sorry, That was what my post was intending to highlight, she forgot about him being upset about something serious because she wanted to make him seem 'silly', she's really horrible.
I agree with you that showing emotion about sport isn't embarrassing anyway (like screaming at a horror film, or laughing loudly at a comedy show you've seen over and over it's a safe release for your pent up feelings, I think it's nice), but it's been a running theme that she ridicules him for watching football, because it doesn't matter to her, so she really believes that it doesn't matter at all.