Our dd2 is 18mo and seems to be embarking upon the 'terrible twos' a little early. She's not speaking properly yet, though does understand basic instructions. She has tantrums when told 'no' that increasingly involve hitting. Hitting anything/anyone including me, her dad, her sister (who is 4.8yo and quite frankly doesn't need this from her baby sis!)
My eldest daughter didn't hit during her toddler years and as we had no other children at the time, this is new to me. Please help me - I'd appreciate any tips on how to manage/stop the hitting.