The husband and the female celeb are friends, idk anything about the female celeb since only 10 chapters updated. The wife took the picture of the affair but it wasn't her who wrote the news (it's still a mystery, my theory is I think the celeb was involved with this because jealousy maybe?), at this point her life and career were over, she got backlash from the media and the celeb fans. When the wife witnessed the affair, she didn't even try to talk to her husband first. Instead, she just moved away and cut all ties with him. The husband tried hard to find her because he still loves her. When he finally found his wife, he tries to talk things out but his wife is yelling and throwing tantrums, basically everything about her downfall was his fault (typical).
If you re-read the first chapter, you can see the wife is taking advantage of the fact that the celeb is her husband's friend, she wanted to milk some info from her husband about someone else's private life (journalists are not much different as stalkers aren't they?).
I mean even if the husband isn't caught cheating(which is not and misunderstanding), she still gonna get backlash because she wanted to write scandalous news about the top dog celeb at the time.
This is one of those stories that could end in 5 chapters if they are just talking, but instead they just drag this shit until reaching 100 chapters.
*sorry if my English is unreadable.