The rakshasis taunted and tormented Sita. She sobbed and shouted at them, "Devour me if you want, cruel rakshasis! I don't care. I refuse Ravana, and my Rama will come and kill you all."
The rakshasi Trijata described a dream she had in which Rama indeed destroyed all of Lanka.
Made anxious by Sita's grief and Trijata's dream, the rakshasis retreated and left Sita alone.
Sita then decided to end her life. "I will use the braid of my hair to hang myself," she said aloud, thinking nobody was there.
But Hanuman, hidden in a tree, saw and heard everything.
Inspired by: Valmiki's Ramayana