Why did juana stay with kino after he attacked her in chapter 5?

Juana knew that she had to stand by her man, even in the midst of his obsession over the Pearl, she had to support him in the midst of his crazyness,

" It meant that he was half insane and half god. It meant that Kino would drive his strength against a mountain and plunge his strength against the sea. Juana, in her woman's soul, knew that the mountain would stand while the man broke himself; that the sea would surge while the man drowned in it."