Depends on the person.how do you even interact with a person that knows your going to marry them
I mean, there's always the casual fling and the mistresses to worry about. This is Japan, after all.Why is she getting jealous, she knows they'll end up married.
Nobody said that was someone else's kid... she's in her future, after all...So she only decided to be friends with the other woman when she got her King Crimson Epitaph vision that she would settle down with someone else.