Hey I don't know if she'd be open to it, but the book "Sacred Marriage" really gets into the role sex and affection play in Christian marriage.
The gist of the book is, "What if God designed marriage to make us holy rather than happy?"
The gist of the sex chapter concerning wives is, essentially, that sexual activity is only really blessed when it occurs between man and woman, together, in marriage, so for a woman to deny her husband sex (assuming the husband is not abusive in any way) is to cut him off from the only sexual companionship and outlet he is allowed.
I realize she probably wouldn't respond well to your telling her that...but the sex part is toward the back of the book. Do you think she'd be open to studying the entire book with you? Maybe by the time she got to that chapter, she'd be more open?
You keep using that word. I do not think it means what you think it means. -- Inigo Montoya, 'The Princess Bride'
