I can only give you an example of what happened when someone close to my Love died. I told him that I was here for him and that if he needed anything let me know. I left it like that and from that place I knew I supported him and he knew the same everyone grieves in their own way. Unfortunately, I think when traumatic things like death happen being alone for a certain period of time is just normal. It doesn't mean that you should stop trying to get her back. I don't think it has anything to do with the death. Who knows maybe she might call... Give her time to heal and who knows what will happen but that choice is up to you. Maybe RS being there and supporting her instead of getting back together in the relationship for the time being. 

Its a very sad situation and please dont jump into conclusion like why she isnt behaving the way she should....losing ones mother is a life changing situation. Just be beside her, you can always text/ call her after a week, infact you must, just to find out how she is and if she needs something. Forget a relationship now, as humans also we must be beside someone grieving...isnt it....and you are her biggest strength, so be it! Just hang on....this phase will also pass. Your support and dedication at this point will prove to be her biggest pillar of strength. 

Anyone else have some thoughts on my situation?