Maybe she'll get it, maybe she won't. Clarifying that it only taught her the alphabet and it took many decades of mindbending work to get an actual spell - wouldn't help right now. Loki shuts her eyes.
"You are a disgrace, but a fortunate one," says Odin. (Thor frowns, but doesn't say anything.) "We will see what comes of the investigation."
And Odin collects her concerned husband and sweeps off.
"There's not a good reason why women don't do magic," Loki says softly. "And there never, ever has been."
"But... but it's... it's not right," she says. "Except... you saved Father's life, that has to have been right, I don't understand why Mother is so angry..."
"Because to save him, I had to know how to do it in the first place," sighs Loki.
"If the Tesseract taught it to you, then that's hardly your fault," says Thor. "It's... it's strange, but if you weren't using magic in battle, if you only knew how to heal, then... I suppose it's not wrong..."
...Let's see how she takes that before Loki explains how thoroughly it is her fault and how she can do other things.
"It's... it's better to use magic against the beast than to lose a friend to it," she says finally, with obvious doubt.
"Well - I knew that this would be my thinking, if it came to it. I knew that if I had the choice of healing Father or letting him die - healing you or letting you die - or Sigyn, though I didn't know him then - I knew that given this choice I'd rather heal. The Tesseract didn't teach me entire spells. It taught me enough to build them. But I knew that if I needed healing, I'd want to have it - so I built it."
"I know. If I'd thought you might, I - I'd've -" Loki trails off.
"Told you, I guess. Earlier. Without having been wedged into a healing in front of an entire parade audience. If I'd thought you'd understand."
"Maybe Sigyn can explain it better than I can. He understands."
"He has some idea what it's like to look at your options and say excuse me, this must have been meant for someone else."
"I told you about how they're the other way around, on Midgard. They don't have any magic to divide up, but everything else, backwards. There's no reason to have it one way and not the other. There's no reason not to have everything both ways. There is no reason why I can't be a healer and Sigyn can't be a warrior. We can, we are, it's only everyone else insisting that it's not done."
"I did. And I'm better at it than anyone else I've ever heard of, too."