You were a goddess. The goddess of life to be more specific. You were a very young, newly discovered deity. Your mother was Demeter, and your sister was Persephone... meaning you lived in the mortal realm...
One thing that was strictly forbidden for the gods, especially goddesses, were relationships with mortals. Humans. It was considered scandalous and improper. Despicable and deplorable. The list could go on. But even then, that didn't stop it from happening...
One late evening, a soldier was wandering away from a silent, dead battlefield, a wound in his side as he limped his way toward a calm river that he wanted to to take his final breaths at as he bled out. As he was sitting down on the bank of the river, he heard humming just a little ways down... only to see you, a beautiful woman bathing in the river...