Comfort Andrew with the fact that it really is just a phase, Chris was hurt when the tiwns first did it, but a few weeks later they didn't want mum, and it had to be dad!!!!!So its just a "thing" they do,and its really not personal. It doesn't bother him at all when Rianna does it. He just keeps going, wether she screams or not ( as they are just testing their "power" to see whos boss)