Sexual assault and harassment can also happen in a marriage, as it is a question of whether some person acts according to the consent or refusal of other(s). Still, divorce and a second marriage is neither sexual assault nor sexual harassment; and age difference among partners alone---as long as all the parties' ages are within legal consensual limits---is not a proof of sexual agression or illegality of the relation, so, nothing to do with #metoo here, regardless of it being priavate or public.

Edit: Not contesting you, btw; just correcting a misinformation.