She dies and gets reincarnated again.
This time as the king's son's wife. The king has exiled himself to the forest after Arissa killed his reputation by spreading rumors about his dick being small. And the prince is now the king. Arissa learns that she is the new queen.
She remembers everything and gets angry again.
She takes an army and finds the king in the forest.
She kills the king by stabbing him in the head.
"You killed me multiple times." She says as he bleeds out. "You are dead." She shouts at him He replies. "This isn't over."
He laughs. "I will be back." He replies.
Arissa knows that he won't come back this time. She laughs and takes his sword as a gift.
She comes back to her castle and orders his head to be on a spike as a warning to everyone else.