They still have to atone for what they did, which includes suffering harsh consequences for what they did. And note, I very specifically don't say doing good things will absolve them, because it doesn't. Doing good things now does not cancel out the evil things one did previously, because if you killed someone, that is irreversible. Saving someone today doesn't do a damn thing for that person you killed yesterday.
That would depend on the god offering atonement wouldn't it? I can see Illmater demanding that she endure some pain, Helm requiring her to stand vigil and Aumanator demanding that the restitution fit the crime.
But Lathander might just think that recovery of her memories is the dawn of a new day and grant her redemption without cost.
