Surely, you may
I just have to think what sort of hint to give. Maybe there's been too much thinking about the mother, perhaps it might help to let her be for a while and try it from the other end. I would suggest looking more at the second half of the riddle, let's say the last part but also the thing about blood and how the Men of Light have earned the Dark One's hate. The words used there are deliberate, they are not merely a "random stuffing". Also, ask yourselves who are the guards "of light - of peace"... and also, you might want to think once again about
Pitchwife's earlier thoughts regarding the third part.