I totally not wrong about that ...
First she seduce kyo saying she was lonely ...
What are you implying here? That because Anna felt lonely, she should ultimately betray him, or what? No offense, but your thoughts reek of incel vibes in general, regardless of what you meant here.
Then still going to the event despite her husband oppose about it ..
1. Sanae went there to accompany her daughter, dude, it's a corporate party for everyone, it would be rude not to accompany her and not to come there at all.
2. Can I then criticize Yuuki for staying late at work, making Sanae feel lonely? There are always compromises in relationships, where sometimes someone has to give in for the sake of the other. And it's easy to say that it's normal for Sanae to agree to this, but she shouldn't accompany her because it bothers her husband. With your history of comments, it seems to me that even if it were okay, you would still complain here because you have some strange incel beliefs about what a woman's loyalty to her husband should look like in a relationship. You ignore Kyotaro's opinion when it doesn't agree with your thoughts and desires, wanting Anna to end her career. In a manga that encourages people not to hide and avoid difficulties if they want to achieve something.
and then flirting with that artist then leave her daughter alone in the event hall for going outside ..somehow ended up at her husband restaurant and never ever bother to justified her action about it
She didn't flirt with him and never intended to do anything with Ken. We only saw fragments of the conversation from Anna's point of view. And even there, it was clear that Sanae herself suggested her husband's restaurant and knew that he would go there if he was lonely. His colleagues themselves said that if he came here, it meant he was lonely, and Sanae obviously knew this after so many years of marriage, as Yuuki would behave. You call the second part illogical, based on the logic that engaging in conversation with him automatically equates to flirting and cheating, when Sanae, by coming to her husband's restaurant, dispelled all the tension, making it clear that it's not that deep, and it's really weird to see how you constantly try to view a conversation between two people of the opposite sex from the outside, wondering whether it's romantic/cheating or not. It's logical if you just stop constantly looking for malicious intent in Sanae.
You're here just because she talked to Ken, regardless of whether she realized what he was trying to achieve with his conversations. You called her actions flirting and assumed that she would cheat on Yuuki with him. And when that didn't happen, he started spreading rumors that your assumptions were true and that it was always meant to be that way, but something changed, as if you were some kind of insider, when no one except Norio and the editors even know how the creative process works. Some arrogance on the level of Homelander, dude. None of us can say what was actually planned and how it was actually planned, and it is very arrogant to act as if you know what was going on behind the scenes without any information about the creative process of this manga. Because all your assumptions are based on prejudices against certain people and smack of incel vibes