1, It's not certain he ever did anything, I think most of the papers have published apologies and retracted the story
2, I'm fairly certain if I slept with all of my best mate's exs my work wouldn't give a shit
What do you do for a living? I'm fairly sure they would give a shit if your mate (and more importantly he'd be your colleague) was affected by it.
For those working in a corporate , office environment, it is highly likely that you would be trouble.