What does Ath-mun do as the slavers lead her brother and all the strong people of the tribe away?

Ath-mun held out her hands as was customary and took her place as the tribe's leader.

Ath-mun lifted her head and listened until she could no longer hear the dull thud of footsteps echoing on the jungle floor. She rose to her feet with difficulty, then holding her hands open and outspread as was the custom of her tribe she advanced slowly toward her people. At-mun had reminded her that her birth had made her the servant of her people. He was still a prince, though chains bound him, and she was a princess. Neither one could escape the work they had been born to do.