Perinatal depression

Any advice,my cousins found out shes pregnant few mnths ago,engaged with a temporary but gr8 job,supportive family and 37years old but...shes really depressed and angry.

Feels like its something thats being done to her and like its not real.granted shes been very sick but shes fightin with her fiance and wer barely allowed 2 mention the pregnancy.what can i do,im worried