How about the Altmer isn't a racist like the rest of them.

My first thought. What better slave then.. a child.

A short, pale, illiterate, savage for a kid.

You don't have to have maternal feelings for the child. You can just be their guardian or mentor.

hahahahah

And make them the best Altmer adopted child ever raised putting to shame the human race of the child which would have gotten inferior results.

Why would she? Why would a purely bred Altmer adopt a child from the lowest classes of the lowest and most inferior races?

But if you say she's a Stormcloak and a thief and hates the Thalmor, then your Altmer is hardly purely bred anymore. No, you gave that all up. Now you are equal with the human races, you are the scum of Nirn and must be wiped off the face of it. Impure elves cannot be allowed to live because they will one day ruin the great race of Mer.