Thor was about to respond with something about him being bigger than Ereshkigal. Maybe not tougher, because the petite Sumerian was downright scary sometimes, but definitely bigger. So he'd like to see her argument for biting off one of his fingers.
But just as he took a step forward to get in front of her again, she burst out laughing. Which was a bit out of the ordinary, so he gave her a blank look. "What?"