I find it quite hard to imagine that Haya was totally ugnorant of his ...shall we call it dark side?
She wasn't a spring chicken of 16 who was married by her father and male elders to this man 20 years her senior. She was already a mature woman, was used to both the eastern, islamic and very male-oriented style and the western, emanzipated, women's rights advocating world.
She chose to marry this man, knowing he already had a host of other wives and scores of children.
I think she pulled the wool over her head herself and enjoyed the lime light and the luxury and when she realized there was a price to pay, she suddenly panicked over the cost.