Got chatting to very nice mum also in her early 40s at a kids' theatre show today. We were just getting seats when she handed her little girl a bottle of cola--then yelled at her to stop! when she began to drink it. At first I thought she had obviously made a mistake with the drink and was going to hand her daughter something more suitable...but no, it was simply to tell her to remove her chewing-gum first!
Was shocked not just at the coke (child was seen drinking a new bottle of cola later) but at the gum, but am I being naive?