Vaguely thinking about Timandra, Helen and Klytemnestra again, and the whole THING in how they're all three joined by committing adultery. (And I do think that in going with this, there is more punch to it if it is indeed adultery and everyone leaves with (or invites in) the lover willingly.)
No matter who is first, Helen or Timandra (though Timandra might be first by quite a bit if she should be counted as either the mother of Meges - a participant in the war - or the mother of a daughter who begot... two participants in the war!). Either way, Timandra and Klytemnestra are the ones still in Greece, while Helen leaves it entirely. Timandra doesn't seem to cause any uproar - except of course there must have been SOMETHING, but surviving tradition has nothing for us. Klytemnestra, of course joins herself to Aigisthos while Agamemnon is away, and then when he's dead; Agamemnon gets no real chance to react to this state of affairs.
And then there is three men they leave their husbands for...
Paris and Aigisthos are known as effeminate, and more or less "dominated" by their wife (not literally, of course alas, but lol). Phyleus is called dear to the deathless gods by Hesiod in the Ehoiai. He comes in for the least amount of negative description there, where Aigisthos is explicitly called a "worse mate" for Klytemnestra, though Paris isn't described at all - there's merely the "Helen dishonoured the couch..." line.
(Helen and Klytemnestra sharing some tastes in men lol, they both have some fondness for softness and effeminacy apparently!)