Im sorry to find out about friend's aunt passing. Please offer my condolences too. My aunt died about 10 years ago, the week before Christmas while she was in church of sudden heart attack. I know it still hurts my mom (aunt was my mom's sister) this time of year. Best thing you can do is be there for her to let her get the immediate hurt out. But, try and help her remember the good times they shared instead of thinking about the loss. It will help to deal with it. Like the Irish do, throw a party in celebrating their life, not mourn their loss.
GL