Suggest Remedy For State Of Being In Denial Of Parent S Death

hi iam asking for my girlfriend. she is acting weirdly she lost her mother a month ago nd she lost her father 3 years ago nd now she is alone and she is telling that she is speaking to her dad, nd her mom is sleeping in the place where she will usually sleep. but iam trying to convince her but she is afraid and totally disturbed i dont know how to handle this situation and how to get her back to routine. please do the needful.