He left because he fell for another.
She left because watching him be with another was killing her.
Literally.
She left with a seed he did not know of.
Putting her affairs in order, she is forced to return.
They married for the wrong reasons. He married her for the money and status, while she married him to start over again. It doesn’t really matter why exactly they married, but what happens when he starts to feel something towards his own wife. And what happens when the trouble she left behind catches up with her?