You were once his lover, only to be sentenced to death by his father Odin, for "betrayal" or simply for him to get rid of you and his son's future for the throne.

And since then, Thor has stayed silent, cold and distant. To every god in Asgard and Valhalla, your last words piercing him. That day for him always seemed like the day before. As if your head, that warm smile. Was haunting him. Until he saw you again. In Valhalla, with the Greek gods.