There's an expression in German which I'll translate: "Shoemaker sole your own shoes". Isn't it usually that way? My Dad was a doctor, and I almost died in front of him when my appendix burst. I sell real-estate, but my kids don't want to hear any tips from me when they buy their homes. And you run marriage seminars, but your daughter won't heed your advice. Egaads, that must make it all the harder for you.
Speaking of marriage seminars; if I were near you I'd sign up. Hubby and I once went to counselling; that held for about a week. Do you have any online info?