NC in case this is outing. I am excessively grieving a death and I'm confused and ashamed about it. I feel like I am stealing grief that isn't mine. Sorry this will probably be long as I want to explain the relationship situation.
My Dsis stepDD has been killed in an accident. She was 25. Obviously this is a terrible tragedy and shock, but it isn't my tragedy.
Context is Dsis and her now DW dated years ago when Dsis still lived at home, DW is older than Dsis and has DC including Amy (not real name) who was of primary school age when they met. So I knew Amy as a little girl but not well, obviously as she'd mainly be at her dad's when her DM was dating my Dsis but occasionally the DC would be around. They were together for a few years but split up for over 10 years. They then got back together and got married, by which time Amy was away at uni so again not around much, at the wedding obviously and the odd family event but she was off living her life as a young woman. So I've known her since she was little but not well. I'd send her a token birthday present and she'd send me a token thank you text. I hadn't seen her since Dsis birthday meal in the summer and I don't even remember talking past saying hello then.
Amy was killed in an accident 3 weeks ago, and I have been a mess since. I cry every day (I'm really not a crier usually). I've cried at work, I cry every night when DC are asleep, I'm carrying around the order of service from her funeral in my handbag. I think about her all the time, far far more than I ever did when she was alive. I want to support Dsis and her DW, this is their tragedy, and I can't be like this around them. I feel like a fraud mourning a girl I rarely thought about and didn't really know as a person and I don't understand it and I need to calm it down so I can be there for the people who did know and love her, and I don't know how.
What make it more confusing is I'm not a stranger to young people dying. My cousin died not much older than Amy, from a reaction to medication. I never shed a tear and I'd known him all his life. I work with people with a degenerative illness which in it's severest form is fatal, and I've known people in their teens and twenties who've died. Obviously I knew them professionally but still I spent a lot more time with them and knew them as people a lot better then I knew Amy.
Thanks anyone who read all that and I'd appreciate any advice or help to make sense of this. I want to support my Dsis and I can't be dissolving into tears around her when it's her loss not mine. I didn't really know Amy, I didn't love her, she didn't cross my mind most of the time and how I'm being isn't right, and I don't understand it especially when I've been around young people's deaths more than most would. Please help if you can.