Start with the part that is verifiable
Separate the event you can describe from the motive or reaction you are guessing. For a message about how to support someone grieving chosen family, use this factual base: use the person's name and relationship when known, and avoid details the family has not shared publicly.
Make one answerable request
Give the recipient one concrete question or next step instead of several emotional jobs at once. Offer one concrete form of help and remove any expectation of an immediate response. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Leave the recipient in control
Do not say everything happens for a reason, demand strength, or center your own similar loss. For immediate risk, traumatic circumstances, or a person unable to stay safe, use local crisis or emergency support. A clear message remains useful even when the answer is no or no answer arrives.