Interesting how it's always the man's fault and the woman can always do better before anyone really knows the facts of the separation. Not having a go at anyone in particular. It's just interesting how sides are taken very early in this sort of thing.
Not always, but in this case it was a good guess. His public behaviour recently must have been extremely embarrassing for her.
And she can do better, that's just a fact. I still remember the reaction when she first got together with him. Extreme bemusement.