North West has been the centre of the Kardashian-West universe for her whole 2.5 years on earth so it's only natural that adding a sibling to the mix would stir things up a bit.
It seems that North, who turned two in June, is having a little trouble adjusting to life as a big sister.
According to reports, she has taken to throwing some serious tantrums since her baby brother Saint arrived at the start of December.
Kim Kardashian and Kanye West are so concerned that they have apparently already consulted a family therapist so they can cut off the problem as soon as possible.
A source told Radar Online: "North has been throwing some serious tantrums and Kim and Kanye do not know what to do.
"They have consulted a family therapist to learn how to deal with this."
Little North is said to be finding it difficult to share the attention her new sibling is getting as family and friends come to meet him.
The source added: "North is used to being the centre of attention and daddy's little girl. The birth of Saint has been really, really hard on her."
Poor North! At least she has her cousins Mason, Penelope and Reign to lean on for support!