Assuming she was a violent lunatic... more than one man of his era imprisoned a wife once he had her money. Her cries could have been of misery and even her attempt to burn Jane could have been jealousy.
I see we will have to agree to disagree on that point. Savaging her brother with her teeth when he came to see if she was being well-treated seems like more than jealousy and misery. And so far as I am aware, the husbands who imprisoned their wives during that era sent them to madhouses. It was frighteningly easy to get a wife committed and much safer for him all around.
Of course for plot purposes, she needed to be in the attic.
And for me the coercion was the trickery involved. He had the money to whisk her abroad but chose not to.
I guess we define coercion differently, too. And whisking her abroad sounds worse to me.
t is entirely personal but the way he treated Jane suggested a man who could not be trusted.
I completely agree with you there. And as I said, selfish and despicable.