I have 18 month old twin girls who are just super 99% of the time, and even make enjoyable games out of sharing, giggling when they pass each other toys and saying 'fanku...', do lots of peekaboo with each other, lovely cuddles and stroking etc. They are genuinely fond of each other.
However, the bigger twin several times a day will try to push her sister over, pull her clothes and pull her hair - hard, she's very strong and yanks actual hairs out. Most of the time I manage to leap in and stop it, but not all the time. The smaller twin obviously gets very upset and I don't want this to set a precedent in their relationship.
A stern no and an unhappy Mummy face just doesn't seem to be cutting the mustard (although she's obviously noticing it as she does hilarious impressions of me!)
DS is 19 so I have completely forgotten developmentally whether they can understand the concept of wrong yet, whether I can start disciplining and they'll make the causal connection, how to discipline when they're too wee for the naughty step etc.
Help!