How Adults Kill a Good Image

Whenever I am photographing families with children the first instruction I give is the adults look at me. I will watch the children and shoot when they are looking forward but I can't watch the adults and kids all at once. I just trust that the grown-ups exercise self-control and keep their faces forward. Here is why.
After about 15 frames of struggling to get this adorable little princess to look at the camera, she FINALLY looked forward, and...crap...mom is looking at her. I remind mom to look at me then the other adults take turns watching to make sure she's looking. Yeah, yeah, I can photoshop it, but it's so much easier for everyone to just look forward. Now you know.