Father-In-Law

I know this must sound really bad, but this man is the bane of my existance. My husband and I have been married 9 years, and have a really great life and marriage,but his father continuosly tries to hurt my feelings. Little comments, rude pin-prick barbs that are designed to hurt...
We have come to verbal blows in the past, but I refuse to do it again because it only hurts my husband. He gets some kick out of reminding me that he wants a grand child when he knows full well that I cannot have children. I spend hours trying to prepare nice meals when he comes for dinner, only to get comments about how this or that could be better. He should realize that I AM a very good wife to his son- frugal, loyal, excellent housekepper etc... But instead he focuses only on faults. So my question is, how can mind fuck this pompas bastard in such a way that he will know that I disdain him too without my husband seeing it and feeling hurt. Nine years is too long to make nice.