K.L.
Hi Anna,
I would have to agree with the other mommies on this - make it a point to make a fuss over your 4 yera old right now. She is feeling somewhat 'replaced' and of course see's baby sister as the 'problem'.
We have a 4 yr old dd, a 17 month old dd and a 2 month old dd - we were very nervous about the older two being jealous of the baby...
We have made it a point to make a big deal out of being the 'big sister' even to our 17 month old daughter. For the 4yr old we let her do things with mommy and daddy that her baby sisters don't get to do - like play games with us during nap, do 'school work' together, go on "one on one" shopping trips with us, etc. She loves to have her nails painted so if she has done a really good job with her baby sisters that week then we will spend time painting her nails - telling her she is such a BIG GIRL and such a great BIG SISTER. I think its so important that each child knows that their 'place' in the family is important - whether they are first born or 4th born!
For our 17 month old, who was attached to my hip 24/7 before the baby came - we have even made her feel like the 'big sister' when it comes to our littlest one. She likes to do things like throw diapers in the trash can, bring us a binky for the baby or even give the baby hugs and kisses. With all this fuss over the big sisters - we haven't really had too bad of a time with jealousy - although a sure fire sign of us 'slacking' in this department with them is when they start acting out...
So then we just step it up a notch with them again! lol
Hope this helps.
Oh - and there are some good books on being a big sister out there that she would probably enjoy 'reading' with you at night. :0)
God bless!
Kelly