Share 'My husband wants my child to say grace.'

My husband, son and I went out to eat dinner on Friday night and when the food arrived, my husband wanted my son to say grace and he wanted me to bow my head and along with it.  I want to teach my son to be grateful for things, but somehow I don't feel right teaching him to thank a nonexistent supernatural being for food that his daddy and I worked hard for.  My husband knows that I am an atheist…