Philosophical Disquisitions
Originally published May 11, 2106
Here is an excerpt:

There is a philosophical literature offering answers to these questions, but from what I have read the majority of it does not deal with the ethics of recovering from a sibling’s death. Indeed, I haven’t found anything that deals directly with this issue. Instead, the majority of the literature deals with the ethics of recovery from the death of a spouse or intimate partner. What’s more, when they discuss that topic, they seem to have one scenario in mind: how soon is too soon when it comes to starting an intimate relationship with another person?
Analysing the ethical norms that should apply to that scenario is certainly of value, but it is hardly the only scenario worthy of consideration, and it is obviously somewhat distinct from the scenario that I am facing. I suspect that different norms apply to different relationships and this is likely to affect the ethics of recovery across those different relationship types.
The information is here.