The whole thing is embarrassing.
Sean and Katya are idiots, especially to do what they did in a public place. They've embarrassed themselves, and it was tacky, no doubt about it.
But please let's get some perspective. He's a shit, and a crap boyfriend, clearly. She's an idiot, but for all we know her and her husband have some sort of 'arrangement', We don't know. What we do know is they kissed, and now every daytime chat show, celebrity, and Tweeter is giving their opinion on it, as if it's a huge scandal and no one has ever kissed someone they haven't have before. And now the girlfriend is trying to turn this into a #metoo situation, making this into an even bigger media circus.
It's all so ridiculous and embarrassing. It was a stupid thing for them to do, but it should be between the people involved, not the nation. Kissing someone who isn't your partner isn't great, but people are behaving as if they were caught having sex in St Paul's Cathedral. There have been far worse things to happen among celebs, but this has been blown way out of proportion.