I know nothing of Anne Rice, but could it be she is new to Christianity? If so, it may just take a little more time before she is able to justly apply principle to real life. I was a Christian earlier than I was a conservative. There was a buffer period.
Her conversion is recent, in the last two or three years, iirc. I’ve experienced ongoing conversion, myself, and continue to find ways I need to change to be consistent with my profession of faith. I hope Anne Rice will, as well.