The tension bled from Frigga's heart when she heard that Odin was safe. She knew that Odin would not take her passing well; it wasn't vanity, just the simple knowledge of how she would have felt had he been taken from her first. They were partners for eons, and the idea of one of them existing without the other seemed impossible, even with Thor presenting such facts to her.

"You must watch over him, Thor," Frigga instructed. "In my absence, the three of you must take care of each other."

It was the only thing that would grant her any peace -- to know that her sons were capable men who were strong and smart, dedicated to safeguarding the realm and their family.