I'm sorry for  your loss. The uncertainty, not knowing why a loved one died, is always hard. Take it day by day.

I've found comfort in this song lately while arranging my brother's memorial service, I hope it helps you: https://www.youtube.com/watch?v=FWV0jpndYbY

Life can be cruel.  How we react to the occasion molds us into the people we are.  While nothing can replace your sister, remember to treasure her memory and all the little things she meant to you.  As for as your thoughtless relatives, try to have some compassion.  Everyone reacts differently to unexpected death and while they may have been inappropriate, they could be hurting inside and trying to hide it or just wanted to distract themselves.  

Good luck on your return to work.  Hopefully, you will be able to concentrate and the routine of work will be somewhat reassuring for you.   

My thoughts and prayers remain with you in this time. 

Thanks you.

DDK if I didn't know my family that well I would tend to agree with you. My cousins think of no one but themselves and several other relatives (not related to them) made the same comments. I tell you if my sibling or I had done it we would never have heard the end of it. It is what it is.

Keep your thoughts and life in perspective while waiting on things.  Move forward and be the person you are now.  You've grown by leaps and bounds since I met you here.  Hugs and so sorry for your loss.