...obviously if the child is about to do something dangerous then of course they must - but in the course of normal conversation it is very irritating to suddenly have someone completely turn their attention to their child for no important reason ...it is rude imo... there's a mum I know who will immediately switch off the moment she spies her child and our conversation ends abruptly. I will ask my ds to wait a second while I finish what I'm saying. It's just good manners really and children maybe should be learning that they aren't necessarily the most important person all the time.