Dealing with sibling jealousy

Kavya has been pretty good with Ishaan from the start and so were thinking that we do not have the sibling jealousy issue. However, after couple of months, she started to show some signs of sibling jealousy - She would talk rudely or become very quiet. At first we weren't very sure if this was related to sibling jealousy, but then few days back, when Gaurav was trying to play with her while holding Ishaan, she explicitly asked him to go and put Ishaan down and then play with her. So, it occurred to us that we are indeed dealing with sibling jealousy ** sigh **

Often times, the issue is very evident when she suddenly starts behaving badly/talking rudely as soon as she sees someone (either me or Gaurav or Koki mummy) holding Ishaan. Infact, she thinks that Koki mummy is here only to take care of Ishaan.. and so she does not talk nicely with Koki mummy sometimes.. :(

We are trying our best to give her attention and involve her in different activities with Ishaan, but I guess it is still hard for her to accept this big change. I read on some site that imagine if your husband brought home some other woman pne fine day and said "Honey, I love you very much, but this woman is going to live with us now"..How would we take it ? It is a very similar situation for kids when they have a younger sibling. Since the younger sibling is not really playing or interacting yet, they see no benefit of having them around.

At least the good thing is that she is good with Ishaan. She also tries to play with him sometimes and hold him and help out in diaper changing, etc. Hopefully, she will get over the sibling jealousy phase soon..