Ok, not sure of any CM advice…. but
it sounds like your 5yo is still jeleous of the 3yo’s existance. I’d recommend the book “Siblings without Rivalry” – a book I need to reread I think! lol
Just a couple of things to keep in mind – at this point I wouldn’t let the 2 girls be anywhere together without close supervision. A 5yo can really hurt a 3yo, without meaning to actually hurt her.
The feelings of your 5yo need to be validated and listened to. Right now she has a lot of ambivalent feelings (at the best) for the 3yo, and probably a lot of very hateful feelings because of the jealousy. These are actually pretty natural when you have a look at the situation. So far the messages she is hearing from you are that these natural feelings are bad, and that she is bad for having them – which will probably make her more angry, and more likely to act out.
Here is what I mean by taking a look at the situation. Of course I’m not saying that things happened exactly this way – but take a look at your feelings with this…….
Say your husband comes home and says something like “Honey, I have great news! I have enjoyed being your husband so much, I’ve decided to have another wife. She’ll be coming home in a month or so. You are going to love her so much and have a lot of fun with her. Don’t worry, I’ll still love you too, but I have enough love for every wife I bring home.” The month or so goes by, and your husband brings home his new wife. She is younger than you, and very cute. Your husband has a couple of parties where everyone gves the new wife gifts, and all the nearby friends and relatives keep dropping in to see the new wife. Most of these frineds and relatives don’t say a lot to you, except how lucky you are to have a younger new-wife in the family. You keep looking at this wife, but she just seems whiny and ugly to you, and doesn’t play with you or anything. You try to mention that you aren’t happy about it at all, and get told what a bad wife you are for thinking that way.
Now a year or so have gone by, and your husband says to you “You know that pretty dress of yours that you loved so much just doesn’t fit you anymore, so I’m giving it to the new wife.” “Oh and your laptop computer (ie, a toy) – you don’t use it much anymore and the new wife would just love to use it.” Later you go into your bedroom and the new wife has gotten into all your makup and broken most of them. Then you are finishing a 1000 piece puzzle that took you hours, and the new wife comes and messes it all up, and you just know inside she did it on purpose even though everyone around you says it was an accident….. and you get so upset you slap her! Now your husband is saying what a horrible person you are to hit the new wife and how she didn’t mean to do any harm – and of course that is after going and hugging and kissing the new wife to make sure that she is ok….
So now lets just look at it…… did you try and visualize all this? How would you feel? Would you like this New Wife person, even if she was really a nice person? And yes, you are adult enough to try to be Christian about it and not give into the feelings – but wouldn’t you be tempted to do things like little pokes when no-one is watching? Or (as is likely as the 5yo gets older) try to do things to get the new-wife in trouble? Wouldn’t you have feelings like she is a little goody-two-shoes, or a spoiled brat that always gets things her way?
Anyway – the one thing I really remember from the book I mentioned, is that if these types of emotions are there – there is only one way for them to go away – and that is for the child to get the opportunity to express them without judgement. Obviously not by hurting the other child – but in a safe way. This can take a while, but makes a huge difference.
The book has a LOT more info in it than this though…. it talks about things we do as parents that make sibling rivalry worse without even knowing it….. Things like setting up a role for each child, or setting up a specialty (ie so-and-so is the musical one, and so-and-so love gymnastics….) or worse comparing (Johnny always gets his room clean SO quickly….)
anyway, hope this gave you something to think on…..