Hi, I just had DD3 a month ago. DS1 is all over the moon with her, he loves her so much and takes great care of her, but DD2 is a bit more complex. She likes the new baby but I also think she feels insecure that her new sister is here to "replace". I've been giving DD2 lots of attention, cuddles, reassurance,... She seemed that she was starting to take this new situation a bit better, but recently she's regressed and she pokes her in the face, she's scratched her a couple of times and just today DH heard her calling DD3 "ugly". What's the best way to handle this? I really want them to have a great relationship and be close to each other