I'm sure this is a common problem. Would really welcome any advice. I have a 2.4 year old and a 7 week old baby.
Big sister is generally very proud of the addition to the family and shows her lots of affection, but sometimes this tips over into aggression - e.g. lying on top of her when trying to 'cuddle', bouncing her far too vigorously in her chair, and even on a couple of recent occasions actually trying to hit her or pull at her babygro.
I know she must be feeling very insecure and it is understandable that she will have very mixed feelings about her sister. We have been giving her lots of attention and praising gentle interaction with the baby, but she has obviously worked out that when she is frustrated about something that the best way to get a reaction from us is to pick on the baby. I am trying to respond with a firm 'no you mustn't hurt your sister' or something similar and then move on quickly and try to distract her.
Does anyone have any suggestions for other ways to deal with this situation? I am beginning to feel constantly on edge and feel I can't leave her alone with the baby even for a minute or two. I'm sure it will pass, but any tips on how to speed up the process would be much appreciated!