(Author's POV)
Her last words "I am sorry" to her dear son Noah, he couldn't even hear those for her own mouth but it still pained him to this day.
His father, Lucius Everests, was a cruel and barbaric wolf as was his mother was just as ruthless to him. But he understood how much suffering and humiliation his mother must have faced at the hands of Lucius Everests and his obsession. Even Moana's own family was just as vicious to her.
Despite all that and not wanting to give birth to Lucius's child, Moana endured it till the very end and when the child was safely delivered, she finally wanted to get her freedom back and out of Lucius's clutches and death was her only escape. She chose it without hesitation.