After all these were guys who were intent on forcing her into marriage and they were a direct threat to her children.
Why would having them slaughtered be so unfeminine?
It would REALLY be a man's "voice", because it would be a male, with dynastic sensibilities, re his son and his kingdom, who would have such concerns.
Because the setting is a guy arrangement. A female POV would have had the guy break into the room and carry her away to safety, not the detailed and careful and wonderful battle scene with Father and Son and faithful retainer whooping butt on the bad guys.
IMHO, of course, based on reading huge amounts of ancient and folk tale material....and lots of more modern stuff as well...