Harley figures it is a mortal, simply because she figures Thor is talking about Amelia. Not that the woman's actual name has not been mentioned... by either of them.

But Thor might want to keep her identity secret for now.

"Does it have to be a blood related heir? I mean there are plenty of Asgardian children who might be well-suited. And your people seem welcoming ... so you could adopt a child who could be the next in line for the throne. Someone your people would want as their next ruler."

"And I don't know what the whole rule situation is for that kindof thing... but couldn't the children of your brother have an opportunity to be the heir?"