Bwahahahahahahaha Sigrun is the most anti-spoiled-brats-mom that could ever be! She agreed on the knife thing only because she thought the kid was ready for it and, come on, throwing knives is a terribly useful skill to have in the troll-fighting army! And she was personally supervising her daughter! But I don't know how well she would handle the emotional needs of a child (lets not talk about teenagers!). She could contain when needed (fear, sadness, anger), but I don't see her being a very tender mom or having cute details towards her family... you know what I mean?
Baby: *cries*
Sigrun: *cries sarcastically back*
Kid: "Mooooooommmmmyyyy I cut my kneeeeeeeeee!"
Sigrun: "Oh, come on, that's not even a scratch."
Kid: "But it's bleeeeeeeeeediiiiiiiiing!"
Sigrun: "Look, I'll pay attention if you need something reattached. Otherwise you're just gonna have to suck it up, wimp."
Other moms: "And here's a print of my baby's feet, and here's a lock of baby hair, and the first lost tooth, and here's a photograph, and..."
Sigrun: "... I think I used to have a birth certificate."
At the same time though, I don't think her kids would have to worry about bullies.
"Dude, don't mess with that kid. Her mom's crazy. Remember Jon? Nobody ever saw him again."